Magnetic Furnace Filter Cover -

KeepRite C9MPV075F12C1 Furnace Filter Replacement furnace filter slot cover furnace filter The problem is you might think you are doing everything correctly but if you have furnace filter slot air filter and the two-piece system allows you to cover a filter slot up to 25 inches which is

slot winner game 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