AllergyZone FilterLock Furnace Filter Slot Seal Door Cover, 12x4

Buy AllergyZone FilterLock Furnace Filter Slot Seal Door Cover at

FURSTD TRADESMAN FURNACE STAND PREM FURSTD TRADESMAN FURSTD FR20253-2SLOT BELVENT FILTER RACK 20 X 25 W 2 SLOT 2 FILTERS

furnace filter slot cover there is a product called filter lock

beat the beast_ kraken’s lair slot The 1 filter slot in a typical furnace return has a pretty poor seal around the filter, which will let a certain amount of air just leak past