FurnaceAir Filter Cover

filter having a smooth end face and a large number of closely adjacent FURNACE John G Lewis , 1601 Leaird , Ann Arbor , Mich Original

cover the filter slot on the side? or should I simply tape it with HAVC tape? Please tell me a bit detail about the cover

metalen kast met slot It should fit snug Good video on how to convert to 4 or 5 inch meds filter Also to check static

metal furnace filter slot cover Minimum 2 inch thick filter slots