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| I am on the same page as JohnW. A source of combustion air from the outside is code. A high and low source here, sized for BTU output of furnace. If you can't wire all components as John says, another option is to build a relatively tight enclosure around the furnace, with the outside combustion air venting into enclosure, or room with a door sealed into a separate compartment from other areas with negative pressure.Is furnace in a separate mechanical room? | |
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House Furnace Downdrafting once Radon System Installed
