with the recent weather in the Chicago area being really cold, I've been playing with the furnace filter... forced air - usual setup -
It's the 20x25 slide in kind - using a medium pleated version vs standard fiberglass
Trying to decide between :
A - leaving it in and having more back pressure on fan motor, and also creating less air flow delivery to rooms
B - taking it out & having less back pressure, and creating more air flow to the rooms
I guess this decision works both in the really cold days of winter, and the really hot days of summer -
?????