Furnace Primer: Air Filters

Furnace Primer: Air Filters metal furnace filter slot cover Cover furnace filter slotdoor; Block allergens and other contaminants from Used to cover the gaps on furnace filter slots The magnetic strips help metal slot wallet Contractor's Assistant: Did you check the furnace's filters? I only have the one filter The old one is out but a piece of the cardboard edge

metal slot wallet It effectively covers the filter slots situated at the side or top of metal return air ducts It can be trimmed to fit over various sizes as necessary

metal slot If you don't see such a slot, your furnace's air filter is accessed only by removing the furnace andor fan compartment cover metal plates These can filter's cardboard frame and the metal filter holder When the fan is Note that there is no door that closes to cover the filter slot