Product Review

Filter Lock Furnace Filter Slot Seal by Allergy Zone is a patented, one-size-fits-all product that covers the filter slot/door to prevent entry of unfiltered air into your heating and air conditioning system (HVAC). Used by HVAC, energy auditing and weatherization professionals to stop air leakage, enhance HVAC system integrity and improve the performance of 1-inch air filters. Stopping air leakage improves indoor air quality and reduces energy consumption. Filter Lock installs in seconds without any tools. The built-in magnets attach Filter Lock to metal duct work and hold it securely in place. Use Filter Lock with any 1-inch air filter measuring up to 25" Long.