Zolton Cohen: Keep that cover on your furnace's air filter -

This patented two-piece system is designed for 1-inch air filters Placing it over the furnace filter slot eliminates air leakage, which improves indoor air

Zolton Cohen: Keep that cover on your furnace's air filter - 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

This patented two-piece system is designed for 1-inch air filters Placing it over the furnace filter slot eliminates air leakage, which improves indoor air

slot promo 100 Sometimes the sheet metal is formed into a slot so that the sheet metal cover that ought to go in there can be slid into place Other times

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 to locate your furnace air filter location for easy filter replacement Look for a long, narrow slot with a removable cover The filter

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