FilterLock: Furnace Filter Slot Seal
FilterLock: Furnace Filter Slot Seal utilizes a magnetic cover to seal your furnace or air conditioning system providing protection and reducing energy. The FilterLOCK is placed over the filter slot (or any seams in metal ductwork) to eliminate the entry of unfiltered air into your forced air system. It works to eliminate leaks in your system, decreasing your energy use. Sealing your air filter slot will keep contaminates out of your duct work by physically blocking allergens and dust from entering the system. Your package includes: two seal pieces that overlap Dimensions - 4-3/4" Wide - Covers slots up to 25" Long