FilterLOCK Furnace and Air Conditioning Filter Seal

FilterLOCK Furnace and Air Conditioning Filter Seal furnace filter slot cover An HVAC professional can retrofit such a filter to your current ductwork if you don't already have a slot that can hold a 4-inch filter furnace filter slot Usually, there's a plate that covers the air filter slot Image: An HVAC technician changing out an air filter Some HVAC systems don't have

furnace filter slot The issue is an open furnace filter slot In other words, the slot has no cover and you can see the spine of the filter A quick look at

troy slot FilterLOCK seals furnace and AC air filter slots up to 25-in Overlapping Filter slot cover Air Filter Accessories · Blue Air Filter Accessories  I think I'll make a similar cover for my furnace filter slot I see the potential for better return air flow upstairs by restricting leakage