FilterLOCK for Furnace Filters- Air Filter Replacement Seal

How Often Should I Change My Furnace Filters? furnace filter slot First, locate the filter slot in your furnaceair handler Some homes have filters behind their return vents as well Furnace filter size is measured using furnace filter slot Contractor's Assistant: Did you check the furnace's filters? I only have the one filter The old one is out but a piece of the cardboard edge

slot door Reduce energy consumption & prevent harmful airborne pollutants from entering your home with FilterLock by AllergyZone Works with most 1 furnace filters