EFFICIENT & ECONOMICAL
GAS-FIRED STEAM OR
HOT WATER HOME HEATING
INDEPENDENCE®/INDEPENDENCE® PV
• Burnham uses quality
Hon eywell con trols on the
Independence and the
Independence PV.
children and safe from accidental
bumps and tampering.
Why settle for just a high
efficiency Burnham Independence
boiler, when you can have a
complete Burnham system?
Improve upon your new boiler’s
efficiency with Burnham’s
• Power ven ted model simplifies
installations when a chimney isn't
available.
• In du stria l qu a lity pressu retrol
for accurate, trouble-free control.
complete line of system compo-
nents including: the Alliance™
family of indirect water heaters,
radiant heat pipe and accessories
from Burnham Radiant Heating
Company, low profile baseboard,
modern radiators, and electronic
controls. Burnham also offers the
industry’s most comprehensive
technical support available. Now
is the time to make Burnham the
one source for your total hydronic
heating system.
One Source for
Total Comfort
• Sta in less steel bu rn ers equal
long life with no rusting like
aluminized burners.
Burnham is dedicated to leading
the hydronic heating industry
through product development and
engineering expertise. With years
of proven dependability, and the
broadest product line, Burnham is
the one brand you can rely on for
your complete home heating
comfort.
• Step-open in g ga s va lve
enables the boiler to start on low
fire and continue on to high fire
safely and smoothly providing
quiet ignition and long life. The
valve is concealed inside the
boiler jacket, hidden from
MODEL
IN3
IN4
'A'
'B'
'C'
'D'
4
5
'E'
'F'
'G'
7-1/4
8-7/8
Dimen sion s ( in in ch es) a n d Sta n da rd Equ ipmen t
*Dimensions indicated are for USA only - For Canada, use dimension on next larger model.
14-1/2 40 33-3/4
17-3/4 40 34-3/4
40-1/4 4-3/4
40-1/4 4-3/4
Standard Equipment:
Rear drafthood (Independence Only)
Cast Iron Sections
Combustible Floor Certified
Stainless Steel Burners
Flame Roll Out Switch (FRS)
Blocked Vent Switch (BVS)
(Independence Only)
IN5
IN6
IN7
IN8
21
40 35-3/4
6
40-1/4 5-1/4 10-1/2
Low Water Cut Off (Steam)
Steam Pressure Gauge (Steam)
Pressure Temperature Gauge (Water)
Thermostat Isolation Relay
Vent Damper - IN3-IN9 (Independence Only)
2" Supply Tapping
24-1/4 40 35-3/4 6* 40-1/4 5-1/4* 12-1/8*
27-1/2 40 36-3/4 40-1/4 7-1/2 13-3/4
30-3/4 40 36-3/4 7* 40-1/4 7-1/2* 15-3/8*
34 40 37-3/4 40-1/4 7-1/2 17
37-1/4 45 38-3/4 8* 45-1/2 7-1/2 18-5/8
7
IN9
8
IN10
IN11
IN12
40-1/2 45 38-3/4
43-3/4 45 38-3/4
9
9
3
3
3
3
45-1/2 7-1/2 20-1/4
45-1/2 7-1/2 21-7/8
2" Return Tapping
(2) 1-1/4" Indirect Water
PIN3PV 14-1/2 45
PIN4PV 17-3/4 45
PIN5PV
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
4
Concealed Step Opening Gas Valve
Safety Relief Valve
Pressure Limit Control (Steam)
Heater Tappings
8-1/4
9-1/4
9-1/4
3" AL29-4C® Stainless Steel Vent
Connector/Terminal (Independence PV Only)
21
45
PIN6PV 24-1/4 45
3
The Money Saving Solution
Since Burnham's Independence
is one of the most efficient boilers
you can buy - with an annual
efficiency of 83.2% - you can
save hundreds of dollars during
your first heating season. Com-
pare this to 60% efficiency for a
typical 20 year old boiler or 50%
for a typical 40 year boiler that
may have been converted from
coal firing. Your local Burnham
dealer can test your current unit
and tell you at what efficiency it
is operating.
A
B
K
C
J
For example, say you spend
$1500 on fuel in one year. To
figure out what your annual
savings would be, simply divide
your existing boiler's efficiency
rating by that of the Indepen-
dence boiler. Multiply that
D
E
I
amount by $1500 and you'll find
out approximately how much it
will cost to operate your new
Independence boiler. You can see
that much of the heat you're
currently paying for is going right
up the chimney!*
H
F
G
How to Determine Your Savings
Formula:
Your Current
A. Rear Drafthood (Independence Only)
B. Large Steam Dome
C. Cast Iron Nipple
Your
Your
Estimated
New Fuel
Bill
Boiler's
Efficiency
Rating
Current
Annual
Fuel Bill
X
=
83.2
D. Deluxe Insulated Jacket
E. Step Opening Gas Valve
F. Combustible Floor Certified
G. Stainless Steel Burners
H. Heavy Duty Base Construction
I. Cast Iron Sections
Example:
Your present boiler's efficiency is rated at
60% and your annual fuel bill is $1500.
60
$1,500
$1,081
X
=
83.2
= $419 Annual Savings
Find out how you can enjoy
winter warmth this year, and for
many years to come. Burnham is
the answer to all your heating
needs.
J. Brand Name Quality Controls
K. Built-in Thermostat Isolating Relay
(*Savings will vary based on
yearly heating degree days.)
4
INDEPENDENCE®
BOILER
SPECIFICATIONS
INDEPENDENCE® RATINGS
Na tu ra l or LP Ga s*
MINIMUM
RECOMMENDED
CHIMNEY SIZE
ROUND
AFUE
DOE
APPROX.
SHIPPING
I=B=R RATING (2)
24V
EI
INPUT HEATING
BOILER
NUMBER
MBH
(1)
CAPACITY WATER STEAM STEAM
WEIGHT Dia. (In.) x Ht.(Ft.)
MBH (1)(2) MBH
MBH
SQ. FT. WATER STEAM WATER STEAM
(LBS.)
(4)(5)
IN3
IN4
IN5
IN6
IN7
IN8
IN9
62
51
87
115
144
173
202
231
44
76
100
125
150
176
201
38
65
86
108
130
152
174
158
271
358
450
542
633
725
81.0
81.3
81.6
81.8
82.1
81.1
81.4
80.0
80.0
80.3
80.6
80.9
80.0
80.3
83.1
83.1
83.1
83.2
83.2
83.2
83.2
81.9
82.0
82.0
82.1
82.1
82.2
82.2
350
420
485
555
620
690
760
4 x 15
5 x 15
6 x 15
6 x 15(5)
7 x 15
7 x 15(5)
8 x 15
105
140
175
210
245
280
GROSS
OUTPUT
MBH
COMBUSTION EFFICIENCY (%)
WATER
STEAM
IN10(3)
IN11(3)
IN12
315
349
385
259.87
287.92
317.62
226
250
276
195
216
239
812
900
996
83.5
83.5
83.5
82.5
82.5
82.5
815
885
955
8x15(5)
9x15
9x15
* LP available on IN3-IN9
1. Ratings shown are for installations at sea level and elevations up to 2,000 ft. For elevations above 2,000 ft., ratings should be
reduced at the rate of four percent (4%) for each 1,000 ft. above sea level.
2. Capacities, outputs and ratings are based on steam combustion efficiency of 82.5%. Water combustion efficiency is 83.5%.
3. For Canadian builds only: Reduce input and output by 3%.
4. 15 ft. height is measured from top of drafthood to top of chimney.
5. IN6, IN8, & IN10 - Canada only: Increase chimney diameter by 1".
Working Pressure: 15 PSI Steam; 30 PSI Water
ORDERING INFORMATION
The Independence is available as:
Packaged - Use prefix PIN (Sizes PIN3-PIN7)
Semi-packaged - Use prefix SIN (Sizes IN3-IN9)
Knocked-down - Use prefix KIN (Sizes KIN3-KIN12)
INDEPENDENCE® PV RATINGS
Na tu ra l Ga s Pa cka ged On ly
DOE
MAXIMUM
VENT LENGTH
APPROX.
SHIPPING
WEIGHT
(LBS.)
I=B=R NET RATINGS
HEATING
CAPACITY
MBH (1)
BOILER
NUMBER
INPUT
MBH
STEAM
MBH
STEAM
SQ. FT.
EQUIVALENT
FT. (2)(3)
AFUE%
PIN3PV
PIN4PV
PIN5PV
PIN6PV
62
52
87
116
145
39
65
87
163
271
363
454
45
35
35
35
83.2
82.2
82.2
82.2
355
425
490
560
105
140
175
109
1. Capacities and ratings are based on steam combustion efficiency of 83.0%. (84.1% for PIN3PV)
2. The approved venting system for the Independence PV is 3" AL29-4C® stainless steel. Do not substitute other materials.
3. Vent pipe length is listed in equivalent feet. Any elbows or tees used have specific values which must be subtracted from the
total length to determine maximum length of straight pipe. Consult Installation, Operating and Service Instructions for details.
Steam only - 15 PSI Working Pressure
Form No. PL81401101000d-02/03-15Ms
Printed in the U.S.A.
©2003 U.S. Boiler Co., Inc. - Lancaster, PA
Ph on e: 717-397-4701
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