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1. | A O Smith Water Heater 315456 002 ManualInstallation Instructions and Use & Care Guide RESIDENTIAL GAS WATER HEATERS HIGH EFFICIENCY ATMOSPHERIC VENT GAS WATER HEATER (FLAMMABLE VAPOR IGNITION RESISTANT) FOR SPACE HEATING AND POTABLE WATER HEATING ONLY. NOT FOR USE IN MOBILE HOMES. This water heater complies with ANSI Z21.10.1-current edition regarding the accidental or unintended ignition of flammable vapors, such as those emitted by gasoline. For Your Safety AN ODORANT IS ADDED TO THE GAS USED BY THIS WATER HEATER. ... Brands:A | User Manual | ENGLISH | [View] | ||||||||||