Hearth and Home Technologies Indoor Fireplace A36C User Manual
Owner’s Manual  
Installation and Operation  
Models:  
A36C, A36CH  
A42C, A42CH  
Wood Burning Fireplace  
NOTICE  
DO NOT DISCARD THIS MANUAL  
•
Read, understand  
and follow these  
instructions for safe  
installation and  
operation.  
•
Leave this manual with  
party responsible for  
use and operation.  
•
Important operating  
and maintenance  
instructions included.  
WARNING  
WARNING  
HOT SURFACES!  
If the information in these instruc-  
tions is not followed exactly, a  
fire may result causing property  
damage, personal injury, or death.  
Screen/mesh, glass doors  
and other surfaces are hot  
during operation AND cool  
down.  
• Do not store or use gasoline or other flam-  
mable vapors and liquids in the vicinity of  
this or any other appliance.  
Hot screen/mesh and glass doors will cause burns.  
•
DO NOT touch screen/mesh or glass doors until  
cooled  
•
NEVER allow children to touch screen/mesh or glass  
doors  
Keep children away  
CAREFULLY SUPERVISE children in same room as  
fireplace.  
• Do not overfire. Overfiring will void your  
warranty.  
•
•
• Comply with all minimum clearances to  
combustibles as specified. Failure to  
comply may cause house fire.  
•
Alert children and adults to hazards of high  
temperatures.  
High temperatures may ignite clothing or other  
flammable materials.  
•
Keep clothing, furniture, draperies and other  
flammable materials away.  
Installation and service of this fireplace  
should be performed by qualified personnel.  
Hearth & Home Technologies suggests NFI  
certified or factory-trained professionals, or  
technicians supervised by an  
WARNING  
NFI certified professional.  
Fire Risk  
•
For use with solid wood fuel or decorative  
gas appliance only.  
•
DO NOT install unvented gas logs.  
Heatilator • A36C & A42C • 28396 • Rev AG • 11/08  
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Safety Alert Key:  
!
•
•
•
•
DANGER! Indicates a hazardous situation which, if not avoided will result in death or serious injury.  
WARNING! Indicates a hazardous situation which, if not avoided could result in death or serious injury.  
CAUTION! Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.  
NOTICE: Indicates practices which may cause damage to the fireplace or to property.  
Table of Contents  
7
8
Installation of Fireplace  
A. Things to Consider  
B. Position the Fireplace  
C. Place Protective Metal Hearth Strips  
D. Level Fireplace  
21  
24  
Congratulations!  
Warranty  
2
4
21  
21  
21  
21  
23  
1
2
Listing and Code Approvals  
A. Appliance Certification  
B. Non-Combustible Materials  
C. Combustible Materials  
6
7
6
6
6
E. Install Outside Air Kit  
Chimney Assembly  
A. Chimney Requirements  
B. Using Offsets/Returns  
C. Assembling Chimney Sections  
D. Install Chimney Air Kit  
E. Installing Ceiling Firestops  
F. Installing Attic Insulation Shield  
G. Cut out Hole in Roof  
H. Complete Installation  
I. Install Flashing  
J. Chimney Termination Requirements  
25  
26  
27  
27  
27  
28  
29  
29  
29  
30  
User Guide  
Operating Instructions  
A. Your Fireplace  
B. Seasoned Wood  
C. Starting a Fire  
D. Grate  
E. Firescreen  
F. Flue Damper  
G. Refractory  
H. Glass Doors  
7
8
8
8
8
8
8
9
9
Chase Installations  
31  
I. Outside Air (optional)  
J. Fan Kit (optional)  
K. Vented Gas Log Sets & Gas Log Lighters  
L. Optional Components  
M. Clear Space  
9
9
9
9
A. Construct the Chase  
B. Install Fireplace & Chimney  
C. Install Chase Top  
31  
32  
32  
33  
D. Install Termination Cap  
9
N. Wood Fuel  
10  
10 Shrouds  
35  
37  
A. Radiation Shield  
B. Field Constructed Shrouds  
35  
35  
3
Maintainance and Service  
A. Disposal of Ashes  
B. Chimney Inspection/Cleaning  
C. Check Firebox Refractory  
D. Inspect Grate  
11  
11  
11  
12  
12  
12  
11 Finishing  
A. Non-Combustible Materials  
B. Combustible Materials  
C. Hearth Extension  
37  
37  
37  
38  
39  
39  
E. Glass Cleaning  
D. Finishing Material  
E. Combustible Mantel  
F. Sidewalls/Surrounds  
4
5
Troubleshooting Guide  
13  
14  
Installer Guide  
Getting Started  
A. Typical Fireplace System  
B. Design and Installation Considerations  
C. Draft  
12 Accessories  
40  
41  
A. Gas Log/Lighter Provision  
B. Wood Burning Inserts  
C. Install Fan  
40  
40  
40  
14  
15  
15  
15  
16  
17  
17  
17  
D. Negative Pressure  
13 Reference Materials  
A. Fireplace Dimensions  
B. Fireplace Components  
C. Chimney Components  
D. Service Parts  
E. Locating Fireplace & Chimney  
F. Tools and Supplies Needed  
G. Typical Fireplace System  
H. Inspect Fireplace and Components  
41  
42  
43  
46  
48  
E. Contact Information  
6
Framing & Clearances  
A. Select Fireplace Location  
B. Clearances  
C. Sidewalls/Surrounds  
D. Frame the Fireplace  
18  
18  
19  
20  
20  
Note: An arrow ( ) found in the text signifies change in content.  
Î
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Warranty  
Hearth & Home Technologies LIMITED WARRANTY  
Hearth & Home Technologies (“HHT”) and its respective brands extends the following warranty for HHT gas, wood,  
pellet and electric appliances purchased from an authorized HHT dealer and installed in the United States of America or  
Canada. Warranty starts with date of purchase by the original owner (End User) except as noted for replacement parts.  
Warranty Period  
Parts Labor  
HHT Manufactured Appliances and Venting  
EPA  
Components Covered  
Gas  
X
Wood  
X
Pellet  
X
Electric Venting  
Wood  
All Parts and Material Except as  
covered by Conditions, Exclu-  
sion, and Limitations listed  
1 Year  
X
X
X
Igniters, Electronic Compo-  
nents, and Glass  
X
X
X
X
2 years  
3 years  
X
X
X
Blowers  
Molded Refractory Panels  
X
X
Firepots  
5 years  
3 years  
3 years  
X
X
Castings & Baf?es  
Firebox, HHT Chimney, Termi-  
nation & Heat  
7 years  
X
X
Exchanger  
10  
years  
1 year  
1 year  
X
Burners, Logs & Refractory  
Limited  
Lifetime  
X
X
Firebox & Heat Exchanger  
All Replacement Parts  
90 Days  
X
X
X
X
X
See Conditions, Exclusions, and limitations.  
9-01-08  
CONDITIONS, EXCLUSIONS & LIMITATION OF LIABILITY  
This warranty applies to the original owner and is transferable up to two years from date of purchase to the new  
homeowner, provided the purchase was made through an authorized dealer or distributor of HHT, and the appliance  
remains in its original place of installation.  
The maximum amount recoverable under this warranty is limited to the purchase price of the product.  
In no event shall HHT be liable for any incidental or consequential damages caused by defects in the product.  
Adjustments, regular maintenance, cleaning and temporary repairs, or the failure to duplicate the problem in the home  
is not covered under this warranty.  
4021-645A 09-01-08  
Page 1 of 2  
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This limited warranty does not extend to or include surface ?nish on the appliance or terminations, door gasketing, glass  
gasketing, glass discoloration, ?rebrick, pellet logs, kaowool or other ceramic insulating materials. Rust and/or corrosion  
on any of the metal surfaces, cast iron components, baf?es, ?repots, doors, or ?rebox area are not covered by this  
warranty.  
Noise resulting from minor expansion, contraction, or movement of certain parts is normal and complaints related to  
this noise are not covered by this warranty.  
HHT’s obligation under this warranty does not extend to damages resulting from: (1) installation, operation or  
maintenance of the appliance not in accordance with the installation instructions; operating instructions and the  
listing agent identi?cation label furnished with the appliance; (2) installation which does not comply with local building  
codes; (3) shipping, improper handling, improper operation, abuse, misuse, accident or unworkmanlike repairs; (4)  
environmental conditions, inadequate ventilation or drafting caused by tight sealing construction of the structure  
or handling devices such as exhaust fans or forced air furnaces or other such causes; (5) use of fuels other than  
those speci?ed in the operating instructions; (6) installation or use of components not supplied with the appliance or  
any other components not expressly authorized and approved by HHT; and/or (7) modi?cation of the appliance not  
expressly authorized and approved by HHT in writing.  
This warranty does not apply to non-HHT venting components, hearth components or other accessories used in  
conjunction with the installation of this product.  
This warranty is void if the appliance has been over-?red or operated in atmospheres contaminated by chlorine,  
?uorine, or other damaging chemicals the appliance is subject to prolonged periods of dampness or condensation, or  
there is any damage to the appliance or other components due to water or weather damage which is the result of, but  
not limited to, improper chimney or venting installation.  
HHT’s liability under this warranty is limited to the replacement and repair of defective components or workmanship  
during the applicable period. HHT may fully discharge all of its obligations under such warranties by repairing the  
defective component(s) at HHT’s discretion. Shipping costs are not covered under this warranty.  
Some states do not allow exclusions or limitation of incidental or consequential damages, so those limitations may not  
apply to you. This warranty gives you speci?c rights; you may also have other rights, which vary from state to state.  
EXCEPT TO THE EXTENT PROVIDED BY LAW, HHT MAKES NO EXPRESS WARRANTIES OTHER THAN THE  
WARRANTY SPECIFIED HEREIN. THE DURATION OF ANY IMPLIED WARRANTY IS LIMITED TO DURATION OF  
THE WARRANTY SPECIFIED ABOVE.  
This Limited Warranty is effective on all HHT appliances sold after September 01, 2008 and supersedes any and all  
warranties currently in existence.  
If warranty service is needed, you should contact your installing dealer. If the installing dealer is unable to provide  
necessary parts or components, contact the nearest authorized HHT dealer or supplier.  
4021-645A 09-01-08  
Page 2 of 2  
Heatilator • A36C & A42C • 28396 • Rev AG • 11/08  
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Listing and Code Approvals  
1
A. Appliance Certification  
B. Non-Combustible Materials  
This fireplace system has been tested and listed in accor-  
dance with UL 127 and ULC-S610 standards by Under-  
writers Laboratories Inc. for installation and operation in  
the United States and Canada.  
•
Materials which will not ignite and burn, composed of  
any combination of the following:  
-
-
-
-
Steel  
Brick  
Concrete  
Glass  
- Iron  
- Tile  
- Slate  
- Plasters  
This fireplace may be installed in sleeping rooms EX-  
CEPT in manufactured homes. If installed with a gas log  
set, provisions for the National Fuel Gas Code must be  
met.  
•
Materials reported as passing ASTM E 136, Standard  
Test Method for Behavior of Metals, in a Vertical Tube  
Furnace at 750° C  
This fireplace has been tested and listed for use with the  
optional components specified in this manual. These op-  
tional components may be purchased separately and in-  
stalled at a later date. Installation of an outside air kit will  
require significant reconstruction and is best if installed at  
the time of fireplace installation.  
C. Combustible Materials  
•
Materials made of or surfaced with any of the following  
materials:  
-
-
Wood  
- Compressed paper  
Plant fibers - Plastic  
Heatilator is a registered trademark of Hearth & Home  
Technologies Inc.  
•
Any material that can ignite and burn; flame proofed or  
not, plastered or un-plastered  
WARNING! Risk of Fire! Hearth & Home Technologies  
disclaims any responsibility for, and the warranty and  
agency listing will be voided by the following actions.  
DO NOT:  
• install or operate damaged fireplace  
• modify fireplace  
• install other than as instructed by Hearth & Home  
Technologies  
• operate the fireplace without fully assembling all  
components  
• overfire  
• install an unvented gas log set  
• install any component not approved by Hearth & Home  
Technologies  
• install parts or components not Listed or approved  
Improper installation, adjustment, alteration, service or  
maintenance can cause injury or property damage. For  
assistance or additional information, consult a qualified  
installer, service agency or your dealer.  
NOTICE: This fireplace is tested and approved as a  
decorative fireplace. It should not be factored as a primary  
heat source in residential heating calculations.  
6
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User Guide  
Operating Instructions  
2
WARNING  
HOT SURFACES!  
Glass and other surfaces are hot during operation AND cool down.  
Hot glass will cause burns.  
•
•
•
•
•
DO NOT touch glass until it is cooled  
NEVER allow children to touch glass  
Keep children away  
CAREFULLY SUPERVISE children in same room as fireplace.  
Alert children and adults to hazards of high temperatures.  
High temperatures may ignite clothing or other flammable materials.  
Keep clothing, furniture, draperies and other flammable materials away.  
•
If you expect that children may come into contact with this fireplace, we recommend a barrier such as a decorative  
screen. See your dealer for suggestions.  
A. Your Fireplace  
WARNING! DO NOT operate fireplace before reading and understanding operating instructions. Failure to operate fireplace  
according to operating instructions could cause fire or injury.  
Flue Damper  
Control  
Section 2.F.  
Refractory  
Section 2.G.  
Close Open  
Grate  
Section 2.D.  
Gas Log Set  
Gas Log Lighters  
(not shown)  
Section 2.K.  
Firescreen  
(not shown)  
Section 2.E.  
Wood Fuel  
Section 2.N.  
Open  
Close  
Outside Air Kit  
Control  
Section 2.I.  
Hearth  
Glass Doors  
(not shown)  
Section 2.H.  
Fan Control  
Section 2.J.  
Clear Space  
Section 2.M.  
Figure 2.1 General Operating Parts  
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B. Seasoned Wood  
D. Grate  
Properly seasoned wood is important for successful  
operation of your fireplace. Most woodburning fireplace  
problems are caused by burning wet, unseasoned wood.  
This fireplace is designed to be used with the grate sup-  
plied with this unit or one approved by HHT. The grate will  
break down over time and will need occasional replace-  
ment.  
Seasoned firewood is wood that is cut to size, split and air  
dried to a moisture content of around 20%.  
WARNING! Risk of Fire! Use only the factory-supplied  
integral grate.  
Imagine a wooden bucket that weighs about eight  
pounds. Fill it with a gallon of water, put it in the fireplace  
and try to burn it. This sounds ridiculous but that is exactly  
what you are doing if you burn unseasoned wood.  
•
•
Keeps logs in place.  
Allows proper air circulation around the fire.  
A tree cut down a year ago and not split is likely to have  
almost as high a moisture content now as it did when it  
was cut.  
E. Firescreen  
The firescreen is provided to control sparks. Keep it  
closed when the fireplace is in use.  
Please refer to Section 2.N. for more detail.  
WARNING! Risk of Fire or Burns!  
•
Screen will not prevent burning materials from falling  
out.  
C. Starting a Fire  
•
Screen pulls or handles may be hot.  
NOTICE: You must establish a good draft to prevent smoke  
spillage into the room.  
WARNING! Risk of Fire! Keep combustible materials,  
gasoline and other flammable vapors and liquids clear of  
the fireplace.  
F. Flue Damper  
•
•
Refer to Figure 2.1 for location of control.  
Must be in fully open position (handle up toward the top  
of the fireplace) during operation of the fireplace.  
Before lighting the fireplace, verify fully open position by  
looking up from the inside of the fireplace.  
DO NOT:  
•
•
store flammable materials close to the fireplace  
use gasoline, lantern fuel, kerosene, charcoal lighter  
fluid or similar liquids to start or “freshen up” a fire in this  
fireplace.  
•
WARNING! Risk of Fire and Asphyxiation! Open  
damper prior to operating fireplace. A closed damper  
overfires the fireplace and spills smoke and flames  
into the room.  
Keep all flammable liquids well away from the fireplace while  
it is in use. Combustible materials may ignite.  
•
The first three or four fires should be of moderate size to  
allow the oils and binders to be burned from the fireplace  
and the refractory and paint to cure. You may notice  
an industrial odor the first few fires. This is considered  
normal.  
Use well-seasoned wood (see Section 2.N.).  
Open the flue damper to a fully open position.  
Place crumpled or twisted paper under the fireplace  
grate.  
G. Refractory  
•
The refractory is supplied to contain heat and provide  
an attractive interior.  
•
It will break down over time and will need occasional  
replacement. Small hairline cracks and discoloration are  
normal and do not affect its safety.  
•
•
•
•
(See refractory maintenance Section 3.C.)  
•
•
Loosely arrange kindling or small pieces of wood to form  
a ‘tent’ on the fireplace grate.  
Pre-warm the flue to establish a draft to help reduce  
smoke spillage during start-up. Hold a rolled up piece  
of burning newspaper under the flue damper for a few  
moments.  
WARNING! Risk of Fire! DO NOT burn fireplace with-  
out refractory. Use only refractory supplied by Hearth &  
Home Technologies, Inc.  
•
•
Light the crumpled paper to ignite the kindling.  
Add small pieces of wood until a hot bed of embers has  
been established.  
•
Add a minimum of three average size pieces of split  
firewood, placed to allow combustion air and flames  
between them.  
CAUTION! Odors and vapors released during initial  
operation may be irritating to sensitive individuals.  
Open windows for air circulation.  
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H. Glass Doors  
K. Vented Gas Log Sets & Gas Log Lighters  
•
•
Optional.  
•
•
Glass doors are optional.  
Refer to Figure 2.2 for how to properly use them.  
Vented gas logs or gas log lighters can be installed in  
this fireplace. Follow the instructions provided with the  
accessory for operation.  
WARNING! Risk of Fire! Install ONLY doors ap-  
proved by Hearth & Home Technologies, Inc.  
WARNING! Risk of Fire or Asphyxiation!  
WARNING! Risk of Fire and Smoke! Fireplaces  
equipped with doors should be operated only with  
doors fully open or doors fully closed. If doors are left  
partly open, gas and flame may be drawn out of the  
fireplace opening.  
• DO NOT install unvented gas logs.  
• Damper must be locked open.  
• Gas flame may generate fumes.  
L. Optional Components  
FULLY OPEN  
CORRECT  
PARTLY OPEN  
INCORRECT  
•
•
Other options may be available  
Consult your dealer/distributor  
WARNING! Risk of Fire! DO NOT install and or use  
any component not approved by Hearth & Home Tech-  
nologies Inc.  
M.Clear Space  
FULLY CLOSED  
CORRECT  
PARTLY CLOSED  
INCORRECT  
•
Do not place combustible objects within 48 in. (1219 mm)  
of the front of fireplace. See Figure 2.3.  
WARNING! DO NOT place combustible objects in front  
of the fireplace. High temperatures may ignite clothing,  
furniture or draperies.  
•
Mantel - avoid placing candles and other heat-sensitive  
objects on mantel or hearth. Heat may damage these  
objects.  
Figure 2.2 Operating Positions of Bi-fold Doors  
I. Outside Air (optional)  
The outside air kit supplies some fresh combustion air for  
your fireplace. It may help reduce the effects of negative  
air pressure. (See Section 5.D.)  
•
•
Refer to Figure 2.1 for location of control  
Close the inlet to prevent cold drafts when the fireplace  
is not being used.  
CAUTION! Risk of Burns! The outside air control  
handle is HOT when fireplace is in operation. Adjust  
BEFORE lighting fire.  
48 in. (1219 mm)  
Clear Space  
Front of Fireplace  
12 in. (305 mm)  
Clear Space  
J. Fan Kit (optional)  
•
Refer to instructions included with fan kit.  
Sides of Fireplace  
(from the FP  
opening)  
Figure 2.3 Clear Space  
Heatilator • A36C & A42C • 28396 • Rev AG • 11/08  
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Seasoned Wood  
N. Wood Fuel  
•
•
•
Cut logs to size  
Split to 6 in. (152 mm) or less  
Air dry to a moisture content of around 20%  
Hardwood vs Softwood  
Your fireplace performance depends on the quality of the  
firewood you use.  
-
-
Soft wood - about nine months  
Hard wood - about eighteen months  
•
Seasoned wood contains about 8,000 BTUs per pound  
.
•
•
•
Hard woods are more dense than soft woods.  
Hard woods contain 60% more BTUs than soft woods.  
Hard woods require more time to season, burn slower  
and are harder to ignite.  
Soft woods require less time to dry, burn faster and are  
easier to ignite.  
Start the fire with soft wood to bring the fireplace up to  
operating temperature and to establish draft.  
Add hard wood for slow, even heat and longer burn  
time.  
NOTICE: Seasoning time may vary depending on drying  
conditions.  
Storing Wood  
•
•
•
Steps to ensure properly seasoned wood:  
•
•
•
•
Stack wood to allow air to circulate freely around and  
through woodpile.  
Elevate wood pile off ground to allow air circulation  
underneath.  
Smaller pieces of wood dry faster. Any piece over 6 in.  
(152 mm) in diameter should be split.  
Wood (whole or split) should be stacked so both ends  
of each peice are exposed to air. More drying occurs  
through the cut ends than the sides.  
Soft woods  
Hard woods  
•
•
•
•
•
•
•
Douglas Fir  
Pine  
• Oak  
• Maple  
• Apple  
• Birch  
Spruce  
Cedar  
Poplar  
Aspen  
Alder  
•
Store wood under cover to prevent water absorbtion  
from rain or snow. Avoid covering the sides and ends  
completely.  
WARNING! Fire Risk! DO NOT store wood:  
•
•
In front of the fireplace.  
In space required for loading or ash removal.  
Moisture  
WARNING! Risk of Fire!  
•
•
DO NOT burn wet or green wood.  
Wet, unseasoned wood can cause accumulation of  
creosote.  
Processed Solid Fuel Firelogs  
Manufactured firelogs may be used with this fireplace.  
Hearth & Home Technologies Inc. recommends the use of  
UL Classified processed fuel firelogs. Follow the manufac-  
turer’s lighting and safety instructions.  
The majority of the problems fireplace owners experience  
are caused by trying to burn wet, unseasoned wood.  
•
Wet, unseasoned wood requires energy to evaporate  
the water instead of heating your home, and  
Evaporating moisture cools your chimney, accelerating  
formation of creosote.  
Using firelogs may require more frequent chimney inspec-  
tion and cleaning.  
•
Do not poke or stir the logs while they are burning. Use  
only firelogs that have been evaluated for the application  
in manufactured fireplaces and refer to firelog warnings  
and caution markings on packaging prior to use.  
10  
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Maintainance and Service  
3
B. Chimney Inspection/Cleaning  
A. Disposal of Ashes  
Frequency: At least twice a year during heating season  
or as recommended by a certified chimney sweep  
By: Certified chimney sweep  
Frequency: When they reach bottom of grate  
By: Homeowner  
WARNING! Risk of Fire! Ashes could contain hot em-  
bers.  
WARNING! Risk of Fire! Ignited creosote is extremely  
HOT. Prevent creosote buildup.  
•
•
Place ashes in a metal container with a tight-fitting lid.  
The closed container should be placed on a  
noncombustible floor or on the ground, well away from  
all combustible materials, pending final disposal.  
If the ashes are disposed of by burial in soil or otherwise  
locally dispersed, they should be retained in the closed  
container until all cinders have thoroughly cooled  
Refer to Figure 3.1 to remove/reinstall termination caps.  
Creosote - Formation and Need for Removal  
When wood is burned slowly, it produces tar and other  
organic vapors, which combine with expelled moisture to  
form creosote. The creosote vapors condense in the rela-  
tively cool chimney flue of a slow-burning fire. As a result,  
creosote residue accumulates on the flue lining. When  
ignited this creosote makes an extremely hot fire.  
•
WARNING! Risk of Fire! A chimney fire can permanently  
damage your chimney system and nearby structures.  
In the event of a chimney fire, Hearth & Home Technolo-  
gies Inc. recommends  
•
•
replacement of the chimney, and  
inspection of the adjacent structure to the provisions of  
NFPA Level III inspection criteria.  
The chimney shall be inspected at least twice a year  
during the heating season to determine when a creosote  
buildup has occurred.  
When creosote has accumulated it shall be removed to  
reduce the risk of a chimney fire.  
Remove screws,  
lift top cover.  
1. Remove the 4 screws.  
2. Remove the screen.  
3. Remove the baffle.  
Remove 4 screws  
and lift top pan off.  
Remove 2 screws from  
the front and back and  
lift the top off.  
Top Cover  
Cap  
Cap  
Cap  
Chimney  
Slip  
Section  
Chase  
TCT375  
Terra Cotta  
Termination Cap  
ST375  
Square  
Termination Cap  
TS345/TS345P  
Square  
Termination Caps  
TR344/TR342  
Round  
Termination Cap  
Figure 3.1 Chimney & Termination Cap Cleaning  
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C. Check Firebox Refractory  
Frequency: After each ash removal  
By: Homeowner  
WARNING! Risk of Fire! Inspect fireplace refractory.  
Crumbling, deteriorated refractory can allow overheating  
of surrounding materials.  
Expansion and contraction will cause minor cracking of  
the refractory. This is normal. The refractory will require  
periodic replacement depending on use.  
The panels should be replaced if  
•
•
•
Cracks exceed ¼ inch (6 mm) in width,  
Metal is exposed behind the refractory,  
Large pieces of refractory fall out.  
D. Inspect Grate  
Frequency: After each ash removal  
By: Homeowner  
Inspect grate for:  
•
•
•
Warping or sagging 1-1/2 in. (38 mm) or more  
Broken welds  
Burn-through of grate bars  
For safe operation, replace only with an approved grate  
from Hearth & Homes Technologies Inc.  
E. Glass Cleaning  
Frequency: As desired  
By: Homeowner  
CAUTION! Handle glass assembly with care. Glass is  
breakable.  
•
•
•
Avoid striking, scratching or slamming glass  
Avoid abrasive cleaners  
DO NOT clean glass while it is hot  
Clean glass with a non-abrasive commercially available  
cleaner or ashes:  
•
Light deposits  
Use household glass cleaner  
Heavy deposits  
-
•
-
-
Use wood ash on damp cloth or,  
Use commercial fireplace glass cleaner (consult with  
your dealer)  
12  
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Troubleshooting Guide  
4
Start Fire Problems  
Possible Cause  
Solution  
Can’t get fire started  
Excessive smoke or spillage  
Burns too slowly  
Not enough kindling/paper or no Use dry kindling, more paper. Arrange kindling &  
kindling/paper  
wood for air movement.  
Damper closed/not fully open  
Not enough air for fire to ignite  
Open damper.  
Smolders, sizzles  
Check for restricted cap/shroud.  
Open air kit (if installed).  
Check for flue blockage.  
Pre-warm flue before starting fire (refer to starting  
fire section).  
Check for adequate vent height (refer to chimney  
assembly section).  
Open window below the fireplace towards the  
wind.  
Wood condition is too wet, too  
large  
Use dry, seasoned wood (refer to wood fuel  
section).  
Bed of coals not established  
before adding wood  
Start with paper & kindling to establish bed of  
coals (refer to starting fire section).  
Flue blockage such as birds’  
nests or leaves in termination  
cap  
Have chimney inspected for creosote and cleaned  
by a certified chimney sweep.  
Down draft or negative pressure Do not use exhaust fans during start-up (refer to  
Competition with exhaust  
devices  
negative pressure section).  
Open window below the fireplace towards the  
wind.  
Fire burns too fast  
Extremely dry or soft wood  
Mix in hardwood.  
Mix in less seasoned wood after fire is established  
(refer to wood fuel section).  
No glass doors  
Overdrafting  
Add glass doors to slow down air flow.  
Check for correct vent height; too much vertical  
height creates overdrafting.  
Check location of vent termination (refer to  
chimney assembly section).  
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Installer Guide  
Getting Started  
5
A. Typical Fireplace System  
Additional lateral  
support for chimney  
above roof (or enclosed  
in chase) if needed  
(Section 8)  
NOTICE:  
•
Illustrations and photos reflect typical installations  
and are for design purposes only.  
•
•
Illustrations/diagrams are not drawn to scale.  
Actual product may vary from pictures in manual.  
Termination cap  
(Section 8 & 9)  
Non-combustible  
roof flashing maintains  
minimum clearance  
around chimney  
Storm Collar  
(Section 8)  
Chimney penetrates roof  
preferably without affecting  
roof rafters (Section 8)  
Support straps  
on rafter support  
chimney (not shown)  
Offset & Return (with hanger straps)  
(Section 8)  
Attic insulation shield (not shown)  
must be used here to keep  
Ceiling firestop  
on floor of attic  
(Section 8)  
insulation away from chimney  
if attic is insulated (Section 8)  
Chimney system  
(Section 8)  
Framing headed off  
in ceiling joists  
(Section 8)  
Combustible framing/header  
on top of V-shaped standoffs  
(Section 6)  
Enclosed space above  
and around fireplace  
(Section 6)  
)))  
Chimney Air Kit  
(Section 8)  
Required in  
Canada. Outlet  
must be no  
less than 6 ft.  
(1.83m) off  
ground level.  
Mantel and surround  
(Section 11)  
Decorative facing  
and trim  
(Section 11)  
)
)
Hearth extension  
(Section 11)  
Factory-built fireplace  
Outside  
combustion air  
(Section 7)  
Protective metal  
hearth strip(s)  
(Section 7)  
Figure 5.1 Typical Fireplace System  
14  
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B. Design and Installation Considerations  
D. Negative Pressure  
WARNING! Risk of Asphyxiation! Negative pressure  
can cause spillage of combustion fumes and soot. Fire  
must draft properly for safe operation.  
NOTICE: Check building codes prior to installation.  
•
•
Installation MUST comply with local, regional, state and  
national codes and regulations.  
Consult insurance carrier, local building inspector, fire  
officials or authorities having jurisdiction over restrictions,  
installation inspection and permits.  
Negative pressure results from the imbalance of air avail-  
able for the fireplace to operate properly. It can be stron-  
gest in lower levels of the house.  
Causes include:  
Before installing, determine the following:  
•
•
•
Exhaust fans (kitchen, bath, etc.)  
Range hoods  
Combustion air requirements for furnaces, water heaters  
and other combustion appliances  
Clothes dryers  
•
•
•
•
•
•
Where the fireplace is to be installed.  
The vent system configuration to be used.  
Gas supply piping.  
Electrical wiring.  
Framing and finishing details.  
•
•
Location of return-air vents to furnace or air  
conditioning  
Whether optional accessories—devices such as a fan,  
wall switch or remote control—are desired.  
•
•
Imbalances of the HVAC air handling system  
Upper level air leaks such as:  
- Recessed lighting  
C. Draft  
Draft is the pressure difference needed to vent fireplaces  
successfully. When a fireplace is drafting successfully, all  
combustion byproducts are exiting the home through the  
chimney.  
- Attic hatch  
- Duct leaks  
To minimize the effects of negative air pressure:  
Considerations for successful draft include:  
•
•
•
•
Install the outside air kit with the intake facing prevailing  
winds during the heating season  
Ensure adequate outdoor air for all combustion  
appliances and exhaust equipment  
Ensure furnace and air conditioning return vents are not  
located in the immediate vicinity of the fireplace  
Avoid installing the fireplace near doors, walkways or  
small isolated spaces  
Recessed lighting should be a “sealed can” design  
Attic hatches weather stripped or sealed  
Attic mounted duct work and air handler joints and seams  
taped or sealed  
•
•
Preventing negative pressure  
Location of fireplace and chimney  
NOTICE: Hearth & Home Technologies assumes no  
responsibility for the improper performance of the fireplace  
system caused by:  
•
•
•
•
•
Inadequate draft due to environmental conditions  
Downdrafts  
Tight sealing construction of the structure  
Mechanical exhausting devices  
Improper location of the chimney  
•
•
•
•
Basement installations should be avoided  
NOTICE: Hearth & Home Technologies Inc. recommends  
the use of direct vent fireplaces in basements.  
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E. Locating Fireplace & Chimney  
Location of the fireplace and chimney will affect perfor-  
mance.  
•
Install through the warm airspace enclosed by the  
building envelope. This helps to produce more draft,  
especially during lighting and die-down of the fire.  
Penetrate the highest part of the roof. This minimizes  
the effects of wind loading.  
Locate termination cap away from trees, adjacent  
structures, uneven roof lines and other obstructions.  
Minimize the use of chimney offsets.  
•
•
•
•
Consider the fireplace location relative to floor and ceiling  
and attic joists.  
•
Take into consideration the termination requirements in  
Section 8 and Section 9.  
NOTICE: Locating the fireplace in a basement or in a location  
of considerable air movement can cause intermittent smoke  
spillage from fireplace. Do not locate fireplace near  
•
•
frequently open doors  
central heat outlets or returns  
Recommended Location:  
• Above peak  
• Inside heated space  
Recommended Location:  
• Above peak  
Marginal Location:  
• Wind loading possible  
Marginal Location:  
• Below peak  
Location NOT recommended:  
• Not the highest point of the roof  
• Wind loading possible  
Location NOT recommended:  
• Too close to tree  
• Below adjacent structure  
• Lower roof line  
• Avoid outside wall  
Recommended:  
• Insulated exterior chase  
in cooler climates  
Windward  
Leeward  
Multi-level Roofs  
Figure 5.2 Recommended Chimney Locations  
16  
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F. Tools and Supplies Needed  
H. Inspect Fireplace and Components  
WARNING! Risk of Fire and/or Explosion! Damaged  
parts could impair safe operation. DO NOT install dam-  
aged, incomplete or substitute components. Keep fire-  
place dry.  
Before beginning the installation be sure the following  
tools and building supplies are available:  
Reciprocating saw  
Pliers  
Framing material  
High temp caulking material  
Gloves  
•
Remove fireplace and components from packaging and  
inspect for damage.  
Hammer  
•
Vent system components and doors are shipped in  
separate packages.  
Phillips screwdriver  
Framing square  
Flat blade screwdriver Electric drill and bits  
•
•
Report to your dealer any parts damaged in shipment.  
Read all the instructions before starting the  
installation. Follow these instructions carefully  
during the installation to ensure maximum safety  
and benefit.  
Plumb line  
Level  
Safety glasses  
Tape measure  
1/2-3/4 in. length, #6 or #8 self-drilling screws  
Misc. screws and nails  
G. Typical Fireplace System  
This fireplace system requires:  
•
•
•
Fireplace/integral grate/refractory/outside air system  
Chimney system and termination cap  
Hearth extension  
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Framing & Clearances  
6
A. Select Fireplace Location  
3/4 in. (19 mm) min. air  
space from fireplace to  
combustible materials. 1/2  
in. (13 mm) allowed at  
nailing flanges.  
Note:  
Note:  
F
G
E
B
A
In addition to these  
framing dimensions, also  
reference the following  
sections:  
• Clearances (Section  
6.B.)  
H
In an exterior chase  
or projecting into a  
garage  
Across a  
corner  
B
C
D
• Mantel Projections  
(Sections 11.E. & 11.F.)  
• Fireplace Dimensions  
(Section 13.A.)  
G
As a  
room  
divider  
Along a wall  
H
A B  
A
B
5/8 in. (16 mm) all  
configurations  
48 in.  
(1219 mm)  
minimum  
G
H
Note: Measurements are FRAMING dimensions only and do  
not include drywall either in the cavity or on the interior walls.  
Model #  
A
51  
B
43  
C
D
E
15 3/4  
400  
18  
F
G
23  
H
in.  
mm  
in.  
74 7/8  
1902  
77 1/2  
1969  
35 3/4  
908  
53  
12 in. (305 mm)  
Minimum from FP  
opening to any  
A36  
1295  
57  
1092  
49  
1346  
54 7/8  
1394  
584  
23  
38 7/8  
987  
perpendicular wall.  
A42  
mm  
1448  
1245  
457  
584  
Figure 6.1 Fireplace Locations (Framing dimensions shown)  
18  
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B. Clearances  
WARNING! Risk of Fire! You must comply with all minimum air space clearances to combustibles as specified in Fig-  
ure 6.2. DO NOT pack required air spaces with insulation or other materials.  
Storm Collar  
(roof)  
Roof Flashing  
Shaded areas  
represent  
2 in. (51 mm) min.  
air space clearance  
required around pipe  
(attic)  
Attic  
Insulation  
Shield  
(insulation)  
(ceiling)  
Offset/Return (secured  
with hanger straps)  
2 in. (51 mm) min.  
(ceiling)  
Must have 2 in. (51 mm)  
Ceiling Firestop  
minimum clearance  
to header  
Adapter attached here  
(not shown)  
0 in. to level  
of standoffs  
3/4 in. (19 mm) to back &  
sides of appliance  
(except at nailing flanges  
where it is 1/2 in. [13 mm])  
48 in.  
1219 mm  
0 in.  
to floor  
Figure 3.2 Clearances to Combustible Materials  
Note: Chimney air kit not shown, but required in Canada.  
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C. Sidewalls/Surrounds  
•
Adjacent combustible sidewalls must be located a minimum of 12 in. (305 mm) (may be 24 in) from the fireplace  
opening.  
•
Combustible and noncombustible mantel legs, surrounds and stub walls may be constructed per Figure 6.3.  
A
B
Grid represents 1 in. scale  
Model #  
Fireplace Opening Outside Dimensions  
in.  
mm  
in.  
36  
914  
42  
42  
1067  
48  
4 in.  
[102 mm]  
A36  
FLUSH  
FRONT  
BRICK  
FRONT  
A42  
mm  
1067  
1219  
10 3/4 in.  
[273 mm]  
A
B
9 3/4 in.  
[248 mm]  
12 in.  
[305 mm]  
12 in.  
[305 mm]  
Figure 6.3 Mantel Leg or Wall Projections (Acceptable on both sides of opening)  
D. Frame the Fireplace  
Figure 6.4 shows typical framing using combustible materials (2x4 lumber shown).  
•
•
Observe all required air space clearances to combustible materials as shown in Figure 6.2.  
Framing across the top of fireplace must be above top standoffs.  
2 in. (51 mm)  
min. air space  
clearance  
from chimney.  
Header MUST NOT be notched!  
D = extra space needed for outside air connection.  
If outside air duct has no bend, this dimension may be  
reduced as long as minimum clearances are met.  
C
D
A
Model #  
A
43  
B*  
23  
C**  
41 1/2  
1054  
D
8
B
in.  
mm  
in.  
A36  
1092  
49  
584  
23  
203  
8
41 1/2  
1054  
A42  
mm  
1245  
584  
203  
* If interior of chase will be drywalled, add the thickness to this measurement.  
** Adjust header height for a raised floor under fireplace.  
Figure 6.4 Framing the Fireplace  
Î
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Installation of Fireplace  
7
CAUTION! Risk of Cuts/Abrasions. Wear protective  
gloves and safety glasses during installation. Sheet metal  
edges are sharp.  
A. Things to Consider  
•
•
•
•
Location of chimney air kit (see Figure 7.4)  
Location(s) of outside air kit  
Electrical connections and/or wall switch  
Gas line piping  
B. Position the Fireplace  
•
•
Place the fireplace on a continuous flat surface.  
Follow framing instructions in Section 6.  
1 in. (25 mm)  
overlap  
WARNING! Risk of Fire! Prevent contact with sag-  
ging, loose insulation.  
• DO NOT install against vapor barriers or exposed  
insulation.  
• Secure insulation and vapor barriers.  
• Provide minimum air space clearances at the sides  
and back of the fireplace assembly as outlined in  
Section 6.  
Protective metal strips are placed 2 in. (51 mm) under the  
front of the fireplace and must extend beyond the front  
and sides of fireplace opening by 2 in. (51 mm).  
Figure 7.1 Position the Protective Metal Hearth Strips  
Top piece must overlap  
bottom piece  
C. Place Protective Metal Hearth Strips  
WARNING! Risk of Fire! Protective metal hearth strips  
MUST be installed. Sparks or embers may ignite flooring.  
Raised Platform  
2 in.  
(51 mm)  
1 in. (25 mm) min.  
overlap  
•
•
Refer to Figures 7.1 and 7.2.  
Locate the two protective metal hearth strips measuring  
approximately 26 in. x 4 in. (660 mm x 102 mm) included  
with this fireplace.  
Slide each metal strip 2 in. (51 mm) under front edge of  
fireplace.  
Floor  
2 in.  
(51 mm)  
•
•
•
•
Overlap strips in the middle of fireplace opening by 1 in.  
(25 mm) minimum..  
Figure 7.2 Protect the Front of an Elevated Platform  
Metal strips must extend beyond the front and sides of  
the fireplace opening by at least 2 in. (51 mm).  
Protect the front of a platform elevated above the hearth  
extension with metal strips (not included with fireplace)  
per Figure 7.2. See Section 11 for hearth extension  
instructions.  
D. Level Fireplace  
•
•
•
Level fireplace side-to-side and front-to-back.  
Shim with non-combustible material as necessary.  
Secure fireplace to framing with nailing flanges with a  
minimum of two fasteners per nailing flange.  
Check fireplace opening for square to ensure proper fit  
of glass doors. Measure diagonals of fireplace opening  
to make sure they are equal.  
•
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3 ft min. from  
top of uppermost  
chimney section  
to air inlet.  
)
)
Note: Chimney air kit  
not shown, but required  
in Canada.  
Figure 7.3 Possible Outside Air Inlet Locations  
NO  
NO  
Garage or  
NO  
Attic space  
Outlet blocked by  
snow, leaves, etc.  
combustible  
liquids storage  
NO  
Outlet placed  
higher than 3 ft  
below the  
termination cap  
YES  
Clear area  
Factory-built  
fireplace  
outside  
house or in  
ventilated  
crawl space  
Figure 7.4 Outside Combustion Air Placement  
22  
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E. Install Outside Air Kit  
•
•
•
Keep duct runs short and straight to minimize restriction.  
A small dip is acceptable for a cold air trap.  
The outside air kit must be installed on the left hand side  
of the fireplace.  
Locate the air inlet in a clear area, preferably into  
prevailing wind during the heating season. Refer to  
Figure 5.2.  
•
•
•
Install as shown in Figures 7.3, 7.4 and 7.5.  
The air duct may be run vertically.  
The outside air inlet must be at least 3 ft (.91 m) below  
the top of the uppermost chimney section.  
CAUTION! Risk of Fire or Asphyxiation! DO NOT  
draw outside combustion air from wall, floor or ceiling  
cavity, or enclosed spaces such as an attic or garage.  
• DO NOT place outside air inlet close to exhaust  
vents or chimneys. Fumes or odor could be drawn  
into the room through the fireplace.  
• Locate outside air inlet to prevent blockage from  
leaves, snow/ice, or other debris. Blockages could  
cause combustion air starvation.  
Flexible Duct  
(not supplied)  
Outside Air  
Plate  
Assembly  
Outside Air  
Hood  
2 Wire Ties  
• Hearth & Home Technologies Inc recommends using  
UL181 Class 0 or Class I rigid or flexible ducting.  
• Secure flex duct with metal tape, screws or wire ties.  
Figure 7.5 Outside Air Installation  
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Chimney Assembly  
8
NOTICE: Chimney performance may vary.  
•
Trees, buildings, roof lines and wind conditions affect  
performance.  
•
Chimney height may need adjustment if smoking or  
overdraft occurs.  
Chimney must extend  
beyond combustible  
roof structure  
Termination Cap  
Additional  
support for  
tall chimneys  
Maintain minimum  
height of chimney  
above roof  
Storm Collar  
Maintain minimum  
clearances to  
combustibles as  
specified  
Install roof flashing  
according to minimum  
requirements  
Support straps for returns  
must be secured to  
adequate framing  
Offsets/returns  
may not exceed  
30° from vertical  
Offsets and returns must  
be secured with the screws  
provided (outer pipe only)  
Lock chimney  
sections together  
firmly to resist  
movement  
Ceiling firestops  
are required where  
chimney passes  
through ceiling or  
floor  
Figure 8.1 Typical Chimney System - Guidelines for Chimney System Installation  
24  
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Determine the chimney components needed to complete  
your particular installation:  
A. Chimney Requirements  
Measure vertical distances from the base of the fireplace  
as shown in Figure 8.2.  
•
Measure the total vertical height of the fireplace  
installation from the base of the fireplace assembly to  
the approximate location of the bottom of the termination  
cap.  
Subtract the effective height of the fireplace assembly  
(see Figure 8.2) from the total vertical height to determine  
the overall height of the chimney installation.  
Create a schematic for your application similar to Figure  
8.2 showing components required (referring to Table  
8.1). Figure 8.1 identifies those components and where  
used.  
• Minimum overall straight height  
• Minimum height with offset/return  
• Maximum height  
16.5 ft  
16.5 ft  
(5.03 m)  
(5.03 m)  
90 ft (27.43 m)  
20 ft (6.1 m)  
•
•
• Maximum chimney length between an offset  
and return  
• Maximum distance between chimney  
stabilizers  
35 ft (10.67 m)  
• Double offset/return minimum height  
20 ft  
6 ft  
(6.1 m)  
• Maximum unsupported chimney length  
between the offset and return  
(1.83 m)  
•
Install a ceiling firestop whenever the chimney penetrates  
a floor/ceiling.  
• Maximum unsupported chimney height above  
the fireplace  
35 ft (10.67 m)  
6 ft (1.83 m)  
• Maximum unsupported chimney above roof  
NOTICE: A maximum of two pairs of offsets and returns  
may be used.  
WARNING! Risk of Fire! You must maintain 2 in. (51  
mm) air space clearance to insulation and other combus-  
tible materials around the chimney system. Failure to do  
so may cause overheating and fire.  
CAUTION! Risk of Fire and/or Asphyxiation! DO  
NOT connect this fireplace to a chimney flue servicing  
another appliance. DO NOT connect to any air distribu-  
tion duct or system. These actions could cause over-  
heating/fire in the chimney flue, or release of exhaust  
fumes into the living areas.  
Table 8.1  
HEIGHT OF CHIMNEY COMPONENTS  
Chimney Stabilizer  
in.  
mm  
6 ft (1.83 m) max.  
unsupported chimney  
above roof  
SL3  
4-3/4  
121  
Ceiling Firestops  
FS338  
FS339  
0
0
0
0
0
0
FS340  
Offsets/Returns  
20 ft (6.10 m) max.  
pipe between an  
offset & return  
SL315  
13-3/8  
15-1/2  
340  
394  
SL330  
Ceiling firestop  
Roof Flashing  
35 ft (10.7 m)  
max. straight  
unsupported  
chimney height  
RF370  
0
0
0
0
RF371  
Chimney Sections*  
SL306  
4-3/4  
10-3/4  
16-3/4  
22-3/4  
34-3/4  
46-3/4  
121  
273  
425  
578  
883  
1187  
16.5 ft (5.03 m) min. height/single offset-return  
20 ft. (6.10 m) min. height/double offset-return  
41-1/4 in.  
(1048 mm)  
Effective  
Height  
SL312  
90 ft (27.4 m) max. height  
SL318  
SL324  
SL336  
SL348  
* Dimensions reflect effective height.  
Figure 8.2 Chimney Requirements  
Heatilator • A36C & A42C • 28396 • Rev AG • 11/08  
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B. Using Offsets/Returns  
•
•
Use an offset/return to bypass overhead obstructions.  
An offset and return can be used as a single entity or separated by chimney section(s).  
WARNING! Risk of Fire! DO NOT use offset/returns greater than 30°. Chimney draft will be restricted and could cause  
overheating and fire.  
•
•
•
Measure the shift needed to avoid the overhead obstruction. Refer to dimension A in Figure 8.3.  
Find the appropriate A dimension listed in Table 8.2.  
The B dimension coinciding with the A dimension measurement in Table 8.2 represents the required vertical clearance  
needed to complete the offset/return.  
•
Read across the chart to find the number of chimney sections/model numbers needed between the offset and return.  
Example:  
A
Your “A” dimension from Figure 8.3 is 14 1/2 in. (368  
mm). Using Table 8.2 the dimension closest to, but  
not less than 14 1/2 in. (368 mm) is 14 1/2 in. (368  
mm) using a 30° offset/return.  
B
You determine from the table that you need 34 1/8 in.  
(867 mm) (Dimension “B”) between the offset and  
return.  
The chimney component that best fits your applica-  
tion is one SL324.  
1-1/4 in. (32 mm)  
OVERLAP  
Figure 8.3 Chimney Offset/Return  
Table 8.2  
15-degree  
30-degree  
A
B
A
B
Offset  
Height  
Offset  
Height  
in.  
mm  
in.  
mm  
340  
SL306 SL312 SL318 SL324 SL336 SL348  
in.  
mm  
92  
in.  
mm  
394  
1-5/8  
2-7/8  
4-1/8  
4-1/2  
5-3/4  
6
41  
13-3/8  
17-3/4  
22-3/8  
23-5/8  
28-1/4  
29-3/8  
34  
-
1
2
-
-
-
-
-
-
-
-
-
-
-
3-5/8  
5-1/2  
15-1/2  
18-5/8  
21-3/4  
23-3/4  
27  
73  
451  
140  
184  
216  
260  
292  
337  
368  
413  
489  
521  
565  
641  
673  
718  
794  
870  
946  
994  
1099  
1146  
1251  
473  
102  
114  
146  
152  
184  
197  
222  
264  
270  
302  
243  
349  
381  
419  
457  
498  
524  
578  
610  
657  
568  
-
-
-
-
-
7-1/4  
552  
600  
1
1
-
-
-
-
-
8-1/2  
603  
718  
1
-
-
-
-
-
10-1/4  
11-1/2  
13-1/4  
14-1/2  
16-1/4  
19-1/4  
20-1/2  
22-1/4  
25-1/4  
26-1/2  
28-1/4  
31-1/4  
34-1/4  
37-1/4  
39-1/8  
43-1/4  
45-1/8  
49-1/4  
686  
746  
1
-
-
-
-
29  
737  
7-1/4  
7-3/4  
8-3/4  
10-3/8  
10-5/8  
11-7/8  
13-1/2  
13-3/4  
15  
864  
-
2
-
-
-
-
32-1/8  
34-1/8  
37-3/8  
42-1/2  
44-5/8  
47-3/4  
52-7/8  
55  
816  
36-1/8  
39-3/4  
45-5/8  
46-3/4  
51-3/8  
57-1/4  
58-3/8  
63  
918  
-
-
1
1
-
-
-
867  
1010  
1159  
1187  
1305  
1454  
1483  
1600  
1746  
1895  
2042  
2137  
2334  
2451  
2629  
1
-
-
-
-
-
949  
-
2
-
-
-
1080  
1133  
1213  
1343  
1397  
1476  
1607  
1740  
1873  
1953  
2137  
2216  
2400  
-
-
-
1
1
-
-
1
-
-
-
-
-
-
-
2
-
-
-
-
-
-
1
1
1
1
1
1
1
1
2
1
-
-
-
-
-
58-1/8  
63-1/4  
68-1/2  
73-3/4  
76-7/8  
84-1/8  
87-1/4  
94-1/2  
16-1/2  
18  
68-3/4  
74-5/8  
80-3/8  
84-1/8  
91-7/8  
96-1/2  
103-1/2  
1
-
-
-
-
-
1
-
-
-
19-5/8  
20-5/8  
22-3/4  
24  
-
-
1
1
-
-
1
-
-
-
-
-
-
1
1
-
1
-
-
-
-
25-7/8  
-
-
-
Proper assembly of air-cooled chimney parts result in an overlap at chimney joints of 1-1/4 in. (32 mm). Effective length is built  
into this chart.  
26  
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C. Assembling Chimney Sections  
D. Install Chimney Air Kit  
WARNING! Risk of Fire! DO NOT install substitute or  
damaged chimney components.  
•
•
Required in Canada.  
Follow instructions provided with this accessory.  
•
Use only those components described in this manual.  
Substitute or damaged chimney components could impair  
safe operation and cause overheating and fire.  
E. Installing Ceiling Firestops  
CAUTION! Risk of Fire! Ceiling firestops must be used  
whenever the chimney penetrates a ceiling/floor.  
•
Support the pipe during construction and check to be  
sure inadvertent loading has not dislodged the chimney  
section from the fireplace or at any chimney joint.  
Attach a straight chimney section or an offset to the top  
of the fireplace.  
Place inner flue to the inside of the chimney section below  
it. Place the outer casing outside the outer casing of the  
chimney section below it. Refer to Figure 8.4.  
• Chase construction requires ceiling firestops at  
each floor or every 10 ft (3.05 m) of clear space.  
• The ceiling firestop slows spread of fire and reduc-  
es cold air infiltration.  
•
•
•
•
•
•
•
Install a ceiling firestop whenever chimney penetrates  
ceiling/floor.  
Mark and cut an opening in ceiling as shown in  
Figure 8.5.  
Frame the opening with the same size lumber used in  
the ceiling joists.  
Nail the ceiling firestop to the bottom of the ceiling joists  
when there is a room above.  
NOTICE: Chimney sections cannot be disassembled  
once locked together. Plan ahead!  
•
Lock chimney sections and/or offsets/returns together by  
pushing downward until the top section meets the stop  
bead on the lower section.  
Pull on the top section to make sure it is fully engaged  
and will not separate.  
You may use #6 or #8 sheet metal screws no longer than  
1/2 in. (13 mm) to fasten chimney sections together. Do  
not penetrate inner flue.  
Use an attic insulation shield if the ceiling is insulated.  
The ceiling firestop may then be attached above or below  
the joists.  
•
•
WARNING! Risk of Fire! DO NOT seal area between  
firestop opening and chimney pipe. Restricting air flow  
around chimney may cause fire.  
WARNING! Risk of Fire! You MUST use screws (pro-  
vided) to fasten offset/returns to chimney sections to  
keep the chimney parts from twisting. Failure to do so  
could cause fire.  
ROOM ABOVE (non-insulated ceiling)  
B
A
•
Fasten offset/returns to chimney sections. Insert the  
screws (provided) through the predrilled holes. Do not  
penetrate inner flue.  
Ceilng firestop from  
bottom  
•
•
Secure chimney returns with hanger straps provided;  
fasten to studs or joists.  
Vertical straight runs of chimney must be supported every  
35 ft (10.7 m).  
ATTIC ABOVE (insulated ceiling)  
Ceiling firestop from  
top  
Note: Use same dimensional lumber for framing  
ceiling firestop and joists.  
A
B
Catalog #  
FS338  
in.  
mm  
368  
368  
368  
in.  
mm  
368  
467  
584  
Angle  
0°  
14-1/2  
14-1/2  
14-1/2  
14-1/2  
18-3/8  
23  
FS339  
15°  
FS340  
30°  
Figure 8.4 Assembling Chimney Sections  
Figure 8.5 Installing the Ceiling Firestop  
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F. Installing Attic Insulation Shield  
Bend remaining tabs  
to rest against pipe to  
prevent insulation  
from falling in.  
WARNING! Risk of Fire! You MUST install an attic insu-  
lation shield when there is any possibility of insulation or  
other combustible material coming into contact with the  
chimney.  
Bend inward  
90°  
•
•
•
DO NOT pack insulation between the chimney and the  
attic insulation shield.  
Failure to keep insulation and other materials away from  
chimney pipe could cause fire.  
Insert three  
screws  
DO NOT offset chimney inside insulation shield.  
Installation of a ceiling firestop is required  
•
•
Refer to Figures 8.6 - 8.8.  
3 in. (76 mm)  
overlap  
Roll the shield (around the chimney if already installed)  
until you have a 3 in. (76 mm) overlap and the three  
holes on each side match up (large holes on top).  
Insert three screws into the matching holes to form a  
tube.  
Bend three tabs on the bottom of the tube inward to 90°  
to maintain chimney air space as shown in Figure 8.6.  
Rest the insulation shield on the ceiling firestop below.  
Bend the three short tabs at the top of the shield inward  
to 90° to maintain the 2 in. (51 mm) air space from the  
chimney.  
Figure 8.6 Prepare Attic Insulation Shield  
•
•
Tabs bent in to  
rest against pipe  
Pipe  
•
•
Attic Insulation Shield  
14-1/2 in. (368 mm)  
diameter  
6 Tabs bent  
in 90°  
•
Bend the remaining top tabs to just meet the pipe.  
Ceiling Firestop  
If you wish to make a custom shield or barrier, follow  
these guidelines:  
Pipe  
Insulation  
Insulation  
•
Metal is preferred, although any material stiff enough to  
hold back the insulation can be used.  
10-1/2 in.  
(267 mm)  
WARNING! Risk of Fire! Use of cardboard or other  
materials that can deflect under humidity or other envi-  
ronmental conditions is not recommended.  
Figure 8.7 Install Attic Insulation Shield (firestop above ceiling)  
•
The shield or barrier must be tall enough to extend  
above the insulation and prevent blown-in insulation  
from spilling into the cavity.  
Tabs bent in to  
rest against pipe  
•
•
Maintain specified air spaces around chimney.  
Check instructions and local codes for further details.  
Pipe  
Attic Insulation Shield  
14-1/2 in. (368 mm)  
diameter  
6 Tabs bent  
in 90°  
Insulation  
Insulation  
10-1/2 in.  
(267 mm)  
Ceiling Firestop  
Pipe  
Figure 8.8 Install Attic Insulation Shield (firestop below ceiling)  
28  
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G. Cut out Hole in Roof  
•
•
•
•
Refer to Figure 8.9.  
Plumb from roof to center of chimney.  
Drive a nail up through roof to mark center of pipe.  
Measure to either side of nail and mark the 14-1/2 in. x  
14-1/2 in. (368 mm x 368 mm) opening required.  
Measure opening on the horizontal; actual length may  
be larger depending on roof pitch.  
•
•
•
Cut out and frame opening.  
Refer to Chapter 25 of the Uniform Building Code for  
roof framing details.  
H. Complete Installation  
WARNING! Risk of Fire! You MUST maintain 2 in.  
(51 mm) air space to insulation and other combustible  
materials around the chimney system. Failure to do so  
could cause overheating and fire.  
•
•
Keep chimney sections from separating or twisting.  
You may secure straight chimney sections at the joints  
with screws no longer than 1/2 in. (13 mm).  
The following steps should be skipped if using a  
chase.  
•
•
Install roof flashing appropriate to roof pitch.  
Install round termination cap and storm collar following  
instructions shipped with the cap.  
I. Install Flashing  
Figure 8.9 Ceiling/Attic Construction  
•
Assemble chimney so it passes through the framed  
opening.  
•
Slip the flashing over the chimney.  
NOTICE: Roofing shingles must be below the flashing  
plate on the lower side of a sloped roof and over the  
flashing plate on the sides and top.  
•
•
Nail the flashing to the roof. Keep gaps between the  
flashing plate and the roof to a minimum.  
Caulk the flashing plate and roof junction as well as the  
vertical seam on the flashing. All nail heads must be  
caulked with a roofing sealant.  
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J. Chimney Termination Requirements  
•
•
•
•
Install a cap approved and listed for this fireplace system.  
Locate cap where it will not become plugged by snow or other materials.  
Locate cap away from trees or other structures.  
The bottom of the termination cap must be at least 3 ft (.91 m) above the roof AND at least 2 ft (.61 m) above any portion  
of roof within 10 ft (3.05 m) as shown in Figure 8.10.  
•
The distance required between caps is shown in Figure 8.10.  
Slanted Roofs  
Chimney must extend 2 ft (.6 m)  
above any portion of the roof or  
Chimney must  
extend 3 ft (.9 m)  
above the roof  
adjacent structures within  
10 ft (3 m) of the chimney  
Flat Roofs  
Chimney must extend 2 ft (.6 m)  
above any portion of the roof or  
adjacent structures within  
10 ft (3 m) of the chimney  
Chimney must  
extend 3 ft (.9 m)  
above the roof  
Multiple Chimney Locations  
Gas, Wood or Fuel Oil  
Termination Cap  
A
B
6 in. (minimum) up to 20 in.  
152 mm/508 mm  
18 in. minimum  
457 mm  
B
20 in. and over  
0 in. minimum  
Wood  
Minimum  
(See  
illustration  
above)  
A *  
Gas  
Termination  
Cap **  
*
If using decorative cap cover(s), this distance may need to be  
increased. Refer to the installation instructions supplied with the  
decorative cap cover.  
** In a staggered installation with both gas and wood terminations, the  
wood termination cap must be higher than the gas termination cap.  
Figure 8.10 Multiple Chimney Locations  
Î
30  
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Chase Installations  
9
Gas line holes and other openings should be caulked with  
high temperature caulk or stuffed with unfaced fiberglass  
insulation. If the fireplace is being installed on a cement  
slab, we recommend that in cold climates, a sheet of  
plywood or other raised platform be placed underneath to  
prevent conducting cold up into the room.  
A. Construct the Chase  
A chase is a vertical boxlike structure built to enclose the  
fireplace and/or its vent system. Vertical chimneys that  
run on the outside of a building must be installed inside a  
chase.  
Construction of the chase may vary with the type of build-  
ing. These instructions are not substitutes for the require-  
ments of local building codes. Local building codes MUST  
be checked.  
Three examples of chase applications are shown in Fig-  
ure 9.2.  
1. Fireplace and chimney enclosed in an exterior chase.  
2. Chimney offset through exterior wall and enclosed in chase.  
3. Chase constructed on roof.  
A chase should be constructed in the manner of all  
outside walls of the home to prevent cold air drafting  
problems. The chase should not break the outside build-  
ing envelope in any manner. All outer walls need to be  
insulated.  
Note: In cooler climates, all chase walls should be insulated.  
Building codes require false ceiling and ceiling firestops  
at each floor of the chase or every 10 ft (3.05 m) of clear  
space to control spread of fire.  
Walls, ceiling, base plate and cantilever floor at the first  
level of the chase should be insulated. See Figure 9.1.  
Vapor and air infiltration barriers should be installed in the  
chase as per regional codes for the rest of the home. Ad-  
ditionally, Hearth & Home Technologies recommends that  
the inside surfaces be sheet rocked and taped (or the use  
of an equivalent method) for maximum air tightness.  
1
2
3
Figure 9.2 Chase Constructions  
Round Termination Cap  
Metal Chase Top  
WARNING! You must install false ceilings and ceiling  
firestops at each floor of the chase or every 10 ft (3.05 m)  
to control spread of fire.  
Firestop  
Spacer  
WARNING! Risk of Fire! DO NOT seal area between fire  
stop opening and chimney pipe. Restricting air flow around  
chimney may cause fire.  
WARNING! Risk of Fire! You must maintain a minimum  
2 in. (51 mm) air space clearance to insulation and other  
materials surrounding the chimney system.  
False Ceiling  
Attic  
•
•
Insulation and other materials must be firmly secured to  
prevent accidental contact with chimney system.  
The chase must be properly blocked to prevent blown  
insulation or other combustibles from entering and  
making contact with fireplace or chimney.  
Insulation  
Shield  
Tabs  
Insulation in the  
outside walls  
of the chase  
Firestop  
Spacer  
•
Failure to prevent contact between insulation or other  
materials and chimney system may cause overheating  
and fire.  
Insulation  
Insulation  
False Ceiling  
Chimney  
False Ceiling  
Figure 9.1 Chase Assembly  
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B. Install Fireplace & Chimney  
Install as per Sections 7 and 8.  
C. Install Chase Top  
2 in. (51 mm) Collar  
on Chase Top  
Slope Downward  
(1/4 in. per foot  
minimum)  
•
You MUST use a chase top in a chase installation. Chase  
tops are available from your Heatilator dealer or may be  
field constructed.  
•
•
Include a turndown and drip edge to prevent water from  
seeping into the chase.  
Turn-down  
Drip Edge  
Include a 2 in. (51 mm) soldered, welded or spun collar  
around pipe opening to keep water out.  
Provide a 1/8 in. (3 mm) gap around the flue pipe.  
Slope the chase top downward away from the  
opening.  
Chase  
•
•
.018 (26 ga) min.  
Galvanized  
Chase Top  
WARNING! DO NOT caulk the pipe to the chase top  
collar. Restricting air flow around chimney may cause  
fire.  
•
•
Caulk all seams to prevent leaks.  
Refer to Figure 9.3.  
Figure 9.3 Chase Top Construction  
32  
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•
TR342 Round Telescoping Termination Cap  
D. Install Termination Cap  
Install the chimney sections up through the chase enclo-  
sure.  
Assemble  
Termination  
storm collar  
Cap  
around extended  
•
Refer to termination cap instructions.  
termination cap  
pipe  
once cap is  
installed.  
WARNING! Risk of Fire! The minimum overlap of cap  
to pipe (as shown in the following illustrations) MUST  
be met or chimney may separate from cap. Separation  
allows sparks, heat and embers to escape.  
Do NOT  
block air  
holes  
Caulk gaps between  
storm collar & pipe,  
and storm collar  
& chase top.  
Storm  
Collar  
3 clip brackets.  
Slip over chase collar  
and attach with screws  
provided.  
NOTICE: Paint the termination cap with a rust-resistant  
paint to protect against the effects of corrosion on those  
parts exposed to the weather.  
Collar  
2 in. (51 mm)  
Minimum Height  
•
TR344 Round Termination Cap  
14 1/2 in. (368 mm)  
Maximum  
Termination  
Cap  
Chase Top  
Slip  
storm collar  
around chimney pipe  
before termination  
cap pipe is snapped  
into the chimney  
pipe.  
Chase  
Do NOT  
block air holes  
Chimney  
Pipe  
6 in. (153 mm)  
Minimum top of  
chase to top of  
chimney pipe  
Caulk gaps between  
storm collar & pipe,  
and storm collar  
& chase top.  
Storm  
Collar  
Termination cap pipe and chimney section must overlap 1-1/2 in. (38 mm)  
Figure 9.5 Installing a TR342 Round Telescoping Termination  
Cap  
Collar  
2 in. (51 mm)  
Minimum Height  
Chimney  
Pipe  
•
ST375 Square Termination Cap  
Chase Top  
Place waterproof  
caulk or sealer under  
each flange of the  
termination cap and  
on top of each screw  
to help prevent leaks.  
Chase  
Flange  
Termination Cap  
4 3/4 in. (121 mm)  
Maximum  
top of chase to  
top of  
Collar  
2 in. (51 mm)  
Minimum Height  
Termination cap pipe and chimney section must be snapped  
together to maintain an overlap of 1-1/2 in. (38 mm).  
chimney section  
Figure 9.4 Installing a TR344 Round Termination Cap  
Chase Top  
Chase  
Chimney  
Pipe  
Termination cap pipe and chimney section must overlap 1-1/2 in. (38 mm)  
Figure 9.6 Installing an ST375 Square Termination Cap  
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•
TS345/TS345P Square Termination Cap  
•
European Copper Series Termination Cap  
Cap top comes assembled in place.  
Place waterproof  
sealer under each  
flange of the termina-  
tion cap and on top of  
each screw to help  
prevent leaks.  
Termination Cap  
Cap Top  
3 in. (76 mm)  
Maximum  
top of chase to  
top of  
(Be sure holes  
in cap top and  
cap base are  
Collar  
aligned.)  
brass screw (8)  
2 in. (51 mm)  
Minimum Height  
(9 for the King-Style)  
chimney section  
Cap Base  
Chase Top  
Chase  
Chimney  
Pipe  
bolt (8)*  
nut (8)*  
washer (8)*  
Termination cap pipe and chimney section must overlap 1-1/2 in. (38 mm).  
bracket (8)*  
screw (8)*  
2 in. (51 mm)  
typical collar height  
Figure 9.7 Installing a TS345/TS345P Square Termination Cap  
chase  
top  
(metal or masonry)  
•
TCT375 Terra Cotta Cap  
CT-3A  
Adapter  
14-1/2 in.  
(368 mm)  
Place waterproof  
sealer under each  
flange of the termina-  
tion cap and on top of  
each screw to help  
prevent leaks.  
SL pipe  
Figure 9.9 Installing an Adapter for European Copper Cap Se-  
ries (CT-King shown)  
Termination Cap  
The last section of pipe  
must stop between 2 in.  
(51 mm) above top of  
chase and 7 in. (178  
Collar  
2 in. (51 mm)  
mm) below top of chase  
Minimum Height  
Chase Top  
2 in. (51 mm)  
7 in. (178 mm)  
Chase  
Chimney  
Pipe  
Termination cap pipe and chimney section must overlap 1-1/2 in. (38 mm)  
Figure 9.8 Installing a TCT375 Terra Cotta Cap  
34  
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Shrouds  
10  
A. Radiation Shield  
Ø 17 1/2 in. (444.5 mm) Round Hole to fit over cap  
•
Some shrouds require a radiation shield. Use where  
specified.  
B. Field Constructed Shrouds  
WARNING! Risk of Fire! Shrouds must be constructed  
as specified. Improper construction may overheat chase  
top.  
3 in. (76 mm) tall legs  
Length x Width to fit inside shroud  
•
Chase top shrouds may be field constructed where  
permitted by regional building codes.  
Figure 10.1 Radiation Shield  
NOTICE: Some regional codes require an agency-Listed  
shroud. Consult your local building officials.  
•
•
•
Hearth & Home Technologies Inc. supplies UL listed  
shrouds. See your dealer for details.  
Shrouds must be constructed of minimum 26 ga sheet  
metal.  
Different shroud designs have been tested for Hearth Technologies fireplace systems using the TR11 and TR11T termination  
caps.  
•
•
The shrouds must be constructed from a minimum .018 in. (26 ga) thick aluminized steel.  
The wire mesh is optional but recommended and must be .018 in. thick minimum.  
Open Top Shroud (TR342 & TR11/TR11T caps require radiation shield)  
Min.  
Top Dim.  
Min.  
Top Dim.  
Min. Opening  
Width  
3 in (76 mm)  
minimum  
Min. Opening  
Width  
Min.  
Base Dim.  
TS345  
TR342  
Min. Base Dims.  
28 x 28  
TR342/344TV  
Min.  
Base Dim.  
in  
23 x 23  
26 x 26  
mm  
584 x 584  
711 x 711  
660 x 660  
Radiation Shield  
Required  
Min. Top Dims.  
25 x 25  
in  
20 x 20  
23 x 23  
mm  
508 x 508  
635 x 635  
584 x 584  
Min. Opening Width  
in  
17 x 17  
432 x 432  
22 x 22  
20 x 20  
mm  
559 x 559  
508 x 508  
Figure 10.2 Open Top Shroud Dimensions  
Heatilator • A36C & A42C • 28396 • Rev AG • 11/08  
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Mailbox Style Shroud (radiation shield required)  
3 in. (76 mm)  
Min. Opening Height  
Min. Height  
above radiation  
shield  
Min. Base Dim  
Min.  
Base Dim  
TS345  
TR342  
Min. Base Dims.  
26-1/2 x 28  
TR342/344TV  
Min. Opening Width  
in  
N/A  
N/A  
28 x 30  
3 in. (76 mm) Min.  
Radiation Shield Height  
from top of Chase  
mm  
673 x 711  
711 x 762  
Min. Height Above Radiation Shield  
in  
N/A  
N/A  
21-1/4  
540  
20-1/2  
521  
mm  
Min. Opening Width  
20-1/2 x 22  
in  
N/A  
N/A  
22 x 24  
mm  
521 x 559  
559 x 610  
Figure 10.3 Mailbox Style Shroud Dimensions  
Roofed Style Shroud (radiation shield required)  
Minimum  
Height above  
Radiation Shield  
Minimum  
Opening  
Height  
Termination  
Cap  
3 in. (76 mm)  
Radiation  
Minimum  
Shield Height  
Base Dimension  
TR342/344  
TS345/445  
TR442/444  
TR342/344TV  
Min. Opening Width  
Min. Base Dims.  
27 x 27  
in  
N/A  
N/A  
27 x 27  
mm  
686 x 686  
686 x 686  
Min. Height Above Radiation Shield  
in  
N/A  
N/A  
16  
16  
mm  
406  
406  
Min. Opening Width  
in  
N/A  
N/A  
21  
21  
mm  
533  
533  
Min. Opening Height  
in  
N/A  
N/A  
12  
12  
mm  
305  
305  
Figure 10.4 Roofed Style Shroud Dimensions  
36  
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Finishing  
11  
•
•
You MUST use a hearth extension with this fireplace.  
This fireplace has been tested and approved for use with  
a hearth extension insulated to a minimum R value of  
1.03.  
The hearth extension material MUST be covered with  
tile, stone or other non-combustible material.  
Manufactured hearth materials will usually have a  
published R value (resistance to heat) or k value  
(conductivity of heat). Refer to the formula in Table 11.1  
to convert a k value to an R value,  
A. Non-Combustible Materials  
•
Materials which will not ignite and burn, composed of  
any combination of the following:  
-
-
-
-
Steel  
Brick  
Concrete  
Glass  
- Iron  
- Tile  
- Slate  
- Plasters  
•
•
•
Materials reported as passing ASTM E 136, Standard  
Test Method for Behavior of Metals, in a Vertical Tube  
Furnace at 750° C  
•
Refer to Table 11.2 for hearth extension insulation  
alternatives.  
B. Combustible Materials  
•
Materials made of or surfaced with any of the following  
materials:  
-
-
Wood  
- Compressed paper  
Plant fibers - Plastic  
•
Any material that can ignite and burn; flame proofed or  
not, plastered or un-plastered  
C. Hearth Extension  
C
WARNING! Risk of fire! High temperatures, sparks,  
embers or other burning material falling from the fireplace  
may ignite flooring or concealed combustible surfaces.  
A
C
D
•
Protective metal hearth strips MUST be installed  
(Section 7.C.).  
Hearth Extension Dimensions  
•
Hearth extensions MUST be installed exactly as  
specified.  
Model #  
A
52  
B
16  
C
8
in.  
mm  
in.  
A36  
(HX3)  
1321  
66  
406  
20  
203  
8
A42  
(HX4)  
mm  
1676  
508  
203  
Table 11.1  
R = 1/k x inches of thickness  
Figure 11.1 Hearth Extension Dimensions  
Table 11.2  
Hearth Extension Insulation Alternatives-Total minimum R Value must equal 1.03  
Minimum  
k per inch  
thick  
r per inch  
thick  
thickness  
required  
Material  
Hearth & Home HX3, HX4 (Micore 300™)  
USG Micore 160™  
0.49  
0.39  
1.92  
5.0  
2.06  
2.54  
0.52  
0.20  
0.20  
0.08  
2.18  
1/2 in.  
1/2 in.  
USG Durock™ Cement Board  
Cement Mortor  
2 in.  
5-1/8 in.  
5-1/8 in.  
12-1/4 in.  
1/2 in.  
Common Brick  
5.0  
Ceramic Tile  
12.50  
0.46  
Armstrong™ Privacy Guard Plus  
Marble  
14.3-20.0  
0.07-0.05 14-5/8 in. - 20-3/8 in.  
Heatilator • A36C & A42C • 28396 • Rev AG • 11/08  
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D. Finishing Material  
Refer to Section 11 for combustible/noncombustible mate-  
rials. Refer to Figure 11.9 for noncombustible zone.  
These surfaces  
may be covered  
with noncombustible  
material.  
WARNING! Risk of Fire! You must maintain clearances.  
High temperature  
sealant.  
•
Use only non-combustible framing material below  
standoffs.  
•
Sheetrock, wood or other combustibles must NOT be  
used as sheathing or facing in the noncombustible  
zone.  
•
•
DO NOT cover metal fireplace front with combustible  
materials.  
Install combustible materials only to specified clearances  
on top front and side edges.  
WARNING! Risk of Fire!  
•
•
DO NOT obstruct air inlets or outlets.  
DO NOT modify grilles. Modifying or covering grilles  
could cause temperature rise and fire hazard.  
Finishing materials must not interfere with: air flow  
through grilles or louvers; operation of louvers or doors;  
access for service.  
Figure 11.9 Noncombustible Facing  
•
•
•
Complete framing and apply facing material (drywall)  
over framing.  
A bead of 300-deg F minimum non-combustible sealant  
must be used to close off any gaps at the top and sides  
between the fireplace and facing to prevent cold air  
leaks.  
•
•
Large gaps can be bridged with fiberglass rope  
gasket.  
Only non-combustible materials may be used to cover  
the metal fireplace front.  
Finished combustible wall  
Flat 2 x 4 stud wall  
2 x 4 header, flush with  
front of stand-offs  
Combustible material  
Non-combustible  
decorative facing  
(up to full brick depth)  
Continuous,  
non-combustible sealant  
Hearth  
Refractory  
Tile, stone or other  
non-combustible material  
HX3 or HX4  
Hearth Ext  
or equivilent  
insulation  
Metal strips are placed 2 in. (51 mm)  
under the front of the fireplace and must  
extend beyond the front and sides of  
fireplace opening by 2 in. (51 mm)  
Floor constructed of wood or  
other combustible material  
Figure 11.10 Decorative Facing  
38  
Heatilator • A36C & A42C • 28396 • Rev AG • 11/08  
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E. Combustible Mantel  
•
•
See Figure 11.11.  
A combustible mantel may be positioned no  
lower than 12 in. (305 mm) above the top of the  
fireplace opening.  
A combustible mantel may have a maximum  
depth of 12 in. (305 mm).  
Combustible trim and materials cannot be placed  
within 6 in. (152 mm) of the fireplace opening  
(top or sides).  
Combustible materials projecting more than  
1-1/2 in. (38 mm) shall not be placed within  
12 in. (305 mm) from the top of the fireplace  
opening.  
6 ft (1829 mm  
MINIMUM  
base of fireplace  
to ceiling  
•
•
Combustible Wall  
Combustible Decorative Facing  
12 in./305 mm MAXIMUM  
•
2 x 4 stud wall  
Standoffs  
Noncombustible  
Decorative Facing  
•
•
Combustible trim must not cover the metal  
surfaces of the fireplace.  
Mantel clearance is in accordance with Section  
7-3.3.3 of ANSI/NFPA211.  
12 in.305 mm MINIMUM  
Seal joint with  
noncombustible  
sealant  
Measured from top of fireplace opening  
F. Sidewalls/Surrounds  
•
Adjacent combustible sidewalls must be located  
a minimum of 12 in. (305 mm) from the fireplace  
opening.  
Figure 11.11 Clearances to Mantels or other Combustibles above Fireplace  
Î
•
Combustible or noncombustible mantel legs,  
surrounds and stub walls may be constructed  
per Figure 11.12.  
Grid represents 1 in. scale  
4 in.  
[102 mm]  
FLUSH  
FRONT  
BRICK  
FRONT  
10 3/4 in.  
[273 mm]  
A
B
9 3/4 in.  
[248 mm]  
12 in.  
[305 mm]  
12 in.  
[305 mm]  
A
B
Model #  
Fireplace Opening Outside Dimensions  
in.  
mm  
in.  
36  
914  
42  
42  
1067  
48  
A36  
A42  
mm  
1067  
1219  
Figure 11.12 Mantel Leg or Wall Projections (acceptable on both sides of opening)  
Heatilator • A36C & A42C • 28396 • Rev AG • 11/08  
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Accessories  
12  
A. Gas Log/Lighter Provision  
B. Wood Burning Inserts  
WARNING! Risk of Fire! Improper installation of wood in-  
serts may cause fireplace or chimney system to overheat.  
WARNING! Fire and/or Asphyxiation Risk! Use with  
solid wood fuel or decorative gas appliance only. Gas fire  
generates fumes.  
If a wood burning insert is being installed in this fireplace,  
Hearth & Home Technologies recommends full reline of  
the chimney.  
•
•
DO NOT install unvented gas logs  
Damper must be locked fully open when gas logs are  
installed  
•
Cooling air openings at the top of the chimney must not  
be obstructed in any manner.  
A certified gas log lighter or decorative gas log set can be  
installed in this fireplace.  
•
Hearth & Home Technologies recommends securing the  
reline at the top of the flue and using the cap certified for  
use with this fireplace system.  
•
•
Maximum input is 100,000 BTU/hr.  
Decorative gas appliance must be certified to ANSI  
Z21.60 “Standard for Decorative Gas Appliances for  
Installation in Vented Fireplaces”.  
C. Install Fan  
•
Must be installed in accordance with the National Fuel  
Gas Code, ANSI Z223.1.  
A gas log set must incorporate a gas shutoff.  
Gas log set requires the damper to be locked fully  
open.  
A listed automatic damper system with safety interlock  
may be used in this fireplace with only compatible,  
listed gas log sets. See damper system manufacturer’s  
instructions.  
•
•
Optional.  
Follow instructions included with fan kit.  
•
•
WARNING! Risk of Electric Shock! DO NOT remove  
grounding prong from plug or route cord under or in  
front of appliance. Plug directly into a properly ground-  
ed three-prong receptacle and route cord away from  
appliance.  
•
•
•
Knockouts are provided on both sides of the fireplace  
and in refractories for 1/2 in. (13 mm) iron pipe.  
Seal refractory around pipe with fireplace mortar or a  
high temperature, noncombustible sealant.  
Outer Shell  
of Fireplace  
Firebox  
Maintain air clearance  
to combustibles.  
Refractory  
Combustible  
Materials  
Seal with  
fireplace mortar  
or high temp  
noncombustible  
sealant  
1-1/2 in.  
(38 mm)  
air space  
Gas Line  
Gas Line  
Combustible materials  
may be located at zero  
clearance to gas line  
beyond 4 in. (102 mm)  
from fireplace side.  
Repack  
Insulation  
Knockout  
4 in.  
(102 mm)  
Figure 12.1 Gas Line Installation  
40  
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Reference Materials  
13  
A. Fireplace Dimensions  
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B. Fireplace Components  
Catalog #  
Description  
A36C/A42C  
Circulating Fireplace with Integral Grate, Hearth Protection  
Strips, Traditional Brick Pattern Refractory and junction box  
A36CH/A42CH  
CirculatingFireplace with Integral Grate, Hearth Protection Strips,  
Herringbone Pattern Refractory and junction box  
DM1736/DM1742  
Bi-Fold Glass Door - Clear View - Black  
DM1736B/DM1742B Bi-Fold Glass Door - Clear View - Polished Brass  
DM1736S/DM1742S Bi-Fold Glass Door - Clear View - Stainless Steel  
Bi-fold Glass Doors  
DM1736  
AK22  
HX3/HX4  
GR18/GR19  
FK23  
Outside Air Kit  
Hearth Extension  
DM1742  
Integral Grate (included with fireplace)  
Fan Kit  
JK9  
Junction Box (should be installed during initial installation to  
avoid considerable reconstruction)  
BC-10  
TK301B  
TK401B  
TK6B  
Fan Speed Control Kit  
Polished brass trim kit (6 bars, 1 hood) - A36  
Polished brass trim kit (6 bars, 1 hood) - A42  
Polished brass louver trim kit (4 pieces) - A36  
Stainless steel louver trim kit (4 pieces) - A36  
Polished brass louver trim kit (4 pieces) - A42  
Stainless steel louver trim kit (4 pieces) - A42  
GR18 & GR19  
Integral Grate  
TK6S  
TK7B  
TK7S  
AK22 Outside Air Kit  
FK23 Fan Kit  
JK9 Junction Box  
(not shown)  
BC10 Fan Speed Motor Control  
(not shown)  
52 in.  
(1321 mm)  
16 in.  
(406 mm)  
HX3 Hearth Extension  
1/2 in.  
(13 mm)  
Herringbone Pattern Refractory  
66 in.  
(1676 mm)  
20 in.  
(508 mm)  
HX4 Hearth Extension  
1/2 in.  
(13 mm)  
Traditional Brick Pattern Refractory  
42  
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C. Chimney Components  
The following pictures show only those chimney components which may be safely used with this fireplace.  
ID4 Insulated Duct  
CAK4A  
ID4  
Chimney Air Kit  
Insulated Duct/Outside Air  
4 in. (102 mm) i  
UD4  
Uninsulated Duct/Outside Air  
SL306  
SL312  
SL318  
SL324  
SL336  
SL348  
SL3  
Chimney Section - 6 in. (152 mm) long  
Chimney Section - 12 in. (305 mm) long  
Chimney Section - 18 in. (457 mm) long  
Chimney Section - 24 in. (610 mm) long  
Chimney Section - 36 in. (914 mm) long  
Chimney Section - 48 in. (1219 mm) long  
Chimney Stabilizer  
42 in.  
(1067 mm)  
UD4 Uninsulated Duct  
4 in. (102 mm) i  
42 in.  
(1067  
SL315  
SL330  
FS338  
FS339  
FS340  
AS8  
Chimney Offset/Return - 15 deg  
Chimney Offset/Return - 30 deg  
Ceiling Firestop - Straight  
)
Ceiling Firestop - 15 deg  
A
Ceiling Firestop - 30 deg  
10-1/2 in.  
(267 mm)  
SL300 Straight Attic Insulation Shield, 24 in. (610 mm)  
Chimney Joint Band  
8 in.  
(203 mm)  
JB877  
CB876  
RF370  
RF371  
TR344  
TR342  
ST375  
TS345  
TS345P  
TCT375  
CT35  
Chimney Bracket  
B
Roof Flashing - Flat to 6/12 Pitch  
Roof Flashing - 6/12 to 12/12 Pitch  
Round Termination Cap  
Chimney Sections  
A
B
Round Telescoping Termination Cap  
Square Termination Cap  
Catalog #  
in  
6
mm  
152  
305  
457  
610  
914  
1219  
in  
mm  
121  
273  
425  
578  
883  
1187  
SL306  
SL312  
SL318  
SL324  
SL336  
SL348  
4-3/4  
Square Termination Cap  
12  
18  
24  
36  
48  
10-3/4  
16-3/4  
22-3/4  
34-3/4  
46-3/4  
Square Termination Cap - Painted  
Terra Cotta Termination Cap  
Chase Top  
LDS33  
LDS46  
LDS-BV  
Decorative Shroud - 3 ft x 3 ft (.91 m x .91 m)  
Decorative Shroud - 4 ft x 6 ft (1.22 m x 1.83 m)  
Decorative Shroud - 26 in. x 26 in. (660 mm x 660 mm)  
A = Actual Length  
B = Effective Length (length of  
chimney part after it has  
Field Constructed Shrouds (See “Woodburning  
Termination Cap”)  
been snapped to another)  
CT-3A  
Adapter - May be used with the following copper caps  
CT-King  
CT-Queen  
CT-Bishop-I  
CT-Bishop-II  
CT-Knight-I  
CT-Pawn  
Inside  
Diameter  
8 in.  
12 in.  
(305 mm)  
20-3/4 in.  
(527 mm)  
12 in.  
(305 mm)  
(203 mm)  
5-1/4 in.  
(133 mm)  
10-1/2 in.  
(287 mm)  
Outside  
Diameter  
10-1/2 in.  
(267 mm)  
4 in. (102 mm)  
4-3/4 in. (121 mm)  
Effective Height  
CAK4A Chimney Air Kit  
SL3 Vent Stabilizer  
Heatilator • A36C & A42C • 28396 • Rev AG • 11/08  
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A
Inside  
Diameter  
8 in. (203 mm)  
B
14-1/2 in.  
(368 mm)  
Outside  
Diameter  
10-1/2 in.  
(267 mm)  
Effective  
Height  
4-3/4 in.  
(121 mm)  
Ceiling Firestop  
Catalog #  
A
B
SL315/SL330 Offset/Return  
FS338  
FS339  
FS340  
0-deg.  
15-deg.  
30-deg.  
14-1/2 in.  
18-3/8 in.  
23 in.  
368 mm  
467 mm  
584 mm  
12 in.  
(305 mm)  
Assembled  
Diameter: 14 1/2 in./368 mm  
Height: 24 in./610 mm  
AS8 Straight Attic Insulation Shield  
24-5/8 in.  
(625 mm)  
27-3/8 in.  
(695 mm)  
10-1/2 in.  
(267 mm)  
RF370 Roof Flashing  
12 in.  
(305 mm)  
2 in. (51 mm)  
JB877 Chimney Joint Band  
24-5/8 in.  
(625 mm)  
31 in.  
(787 mm)  
10-1/2 in.  
(267 mm)  
RF371 Roof Flashing  
CB876 Chimney Joint Band  
44  
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20 in.  
(508 mm)  
15-3/4 in.  
(400 mm)  
17 in.  
(432 mm)  
34-3/4 in.  
(883 mm)  
9-3/8 in.  
(238 mm)  
TR344 Round Termination Cap  
32-1/2 in.  
(826 mm)  
9-1/4 in.  
(235 mm)  
TCT375 Terra Cotta Cap  
TR342 Round Telescoping Termination Cap  
7 3/4 in.  
13-1/4 in.  
(337 mm)  
23 in.  
(584 mm)  
19 in.  
(483 mm)  
16-1/4 in.  
(413 mm)  
26 in.  
22 in.  
15-5/8 in.  
(397 mm)  
(559 mm)  
23-1/8 in.  
(587 mm)  
CT-3A  
ST375 Square Termination Cap  
18 in.  
(457 mm)  
TS345/TS345P Square Termination Cap  
72 in.  
(1829 mm)  
36 in.  
(914 mm)  
10-7/8 in.  
(276 mm)  
TR-TVK  
2 in. (51 mm)  
CT35 Chase Top  
E
D
C
D
C
B
B
A
A
LDS33/LDS46 Decorative Shroud  
LDS-BV Decorative Shroud  
A
B
C
D
Catalog #  
A
26  
B
C
D
22  
E
23  
Catalog # in.  
mm  
914  
in.  
36  
72  
mm  
in.  
mm  
in.  
11  
11  
mm  
279  
279  
in.  
12-1/2 15-1/2  
318 394  
LDS33  
LDS46  
36  
48  
914 8-1/2 216  
1829 8-1/2 216  
LDS-BV  
mm  
660  
533  
584  
1219  
Heatilator • A36C & A42C • 28396 • Rev AG • 11/08  
45  
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D. Service Parts  
46  
Heatilator • A36C & A42C • 28396 • Rev AG • 11/08  
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D. Service Parts (continued)  
Heatilator • A36C & A42C • 28396 • Rev AG • 11/08  
47  
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E. Contact Information  
Hearth & Home Technologies Inc.  
1915 W. Saunders Street  
Mt. Pleasant, Iowa 52641  
www.heatilator.com  
Please contact your Heatilator dealer with any questions or concerns.  
For the number of your nearest Heatilator dealer, please visit www.heatilator.com.  
– NOTES –  
CAUTION  
DO NOT DISCARD THIS MANUAL  
•
Read, understand  
and follow these  
instructions for safe  
installation and  
operation.  
•
Leave this manual with  
party responsible for  
use and operation.  
•
Important operating  
and maintenance  
instructions included.  
This product may be covered by one or more of the following patents: (United States) 4593510, 4686807, 4766876,  
4793322, 4811534, 5000162, 5016609, 5076254, 5113843, 5191877, 5218953, 5263471, 5328356, 5341794, 5347983,  
5429495, 5452708, 5542407, 5601073, 5613487, 5647340, 5688568, 5762062, 5775408, 5890485, 5931661, 5941237,  
5947112, 5996575, 6006743, 6019099, 6048195, 6053165, 6145502, 6170481, 6237588, 6296474, 6374822, 6413079,  
6439226, 6484712, 6543698, 6550687, 6601579, 6672860, 6688302B2, 6715724B2, 6729551, 6736133, 6748940,  
6748942, 6769426, 6774802, 6796302, 6840261, 6848441, 6863064, 6866205, 6869278, 6875012, 6880275, 6908039,  
6919884, D320652, D445174, D462436; (Canada) 1297749, 2195264, 2225408, 2313972; (Australia) 780250, 780403,  
1418504 or other U.S. and foreign patents pending.  
48  
Heatilator • A36C & A42C • 28396 • Rev AG • 11/08  
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