LLigetfa
Minister of Fire
OMG! What a hack job. Whoever did that should get their license pulled. OTOH the guy probably didn't have a license. There is not supposed to be a cold return that close to the furnace. A register of that size that close pretty much negates all the other cold returns as it can short circuit the path.
Remove that last section of duct that has the register cut into it. Mount a proper filter housing next to the furnace. Get the kind that hold a 4 inch thick filter as they have better surface area.
How many sq inches of warm air supply is there to that cellar space? There is supposed to be twice the area of warm registers to cold return.
Remove that last section of duct that has the register cut into it. Mount a proper filter housing next to the furnace. Get the kind that hold a 4 inch thick filter as they have better surface area.
How many sq inches of warm air supply is there to that cellar space? There is supposed to be twice the area of warm registers to cold return.