United Filter: Furnace Filters

Cover Air Filter Slot at Rs 40piece New Delhi furnace filter slot cover AllergyZone - FilterLock Filter Slot Seal – Seal Cover for Any 1” Furnace Filter, Up To 25” Long Protect Your HVAC System: FilterLock is a patented furnace filter slot Features: Cover furnace filter slotdoor; Block allergens and other contaminants from entering home including deadly gases like carbon monoxide and radon

design slot I wonder if the previous owner lost the cover for the filter slot I would think that you would want this covered