Question: I was recently told that I could put (4) 1” inch filters together and use as a replacement for the expensive 4 inch pleated filter in my Aprilaire Spaceguard furnace filter system. It is never a good idea to stack filters in this way. It restricts air flow and can cause the air conditioner [...]
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Question: I measured the metal frame of my furnace filter at 19 1/2 x 24 1/2 x 3/4 inches but after looking closer at it I saw a measurement of 20 x 25 x 1 on the frame. Now I’m not sure what size filter to replace it with. Shopping for a new air filter [...]
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