Filter Monster FilterLock Furnace Filter Slot Seal 2pack

The FilterLOCK covers and seals the standard 1” furnace filter slots The overlapping two-piece design allows for filter slots measuring up to 25” in width

I have a house where the furnace has a 25 x 1 wide slot in the air intake where I slide the 16x25x1 filter in from the top

furnace filter slot Why does the furnace not come with a filter slot cover? We recently got a question asking us

book fra slot If your filter slot doesn't have a cover, air, dust, and debris can be sucked into your system