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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.
FilterLOCK® seals furnace and air conditioning air filter slots to reduce utility bills and improve indoor air quality.