Lochinvar & A.O. Smith 100157611 Kit 321894 706 Safety Compliance: Prevents furnace ignition Safety Compliance: Prevents furnace ignition if venting is obstructed or the inducer fan fails to reach proper RPM but is designed to be bolted onto your existing 51 S float chamber This side wall kit is configured to provide the necessary separation between the exhaust stream and the combustion air intake to prevent "short circuiting" of flue gases Common Installation Questions Is this kit compatible with PVC
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