FilterLock Duct Filter Seal

FilterLock stops dirty, unfiltered air from entering your home through an open or poorly sealed air filter slot/door on your heating and air conditioning system. FilterLock is reusable and extremely durable. The patented, one-size-fits-all product installs in seconds without any tools and there are no sharp metal surfaces to be concerned with.

• Eliminate air leakage in HVAC systems to help reduce utility bills and save energy
• Improve indoor air quality by blocking allergens, dust, and gases like carbon monoxide
• Easy to install: attaches magnetically to ductwork to cover furnace filter slot door
• The two-piece overlapping design fits most filter slots