Item # 5GDQOQUPC: 855118000257


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).  Sealing your air filter slot will keep contaminates out of your duct work by physically blocking allergens and dust from entering the system.

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

  • Blocks allergens and other harmful pollutants, including carbon monoxide & radon from entering the HVAC system at the air filter slot
  • Saves energy & reduces energy bills
  • Improves indoor air quality
  • Universal one size fits all
  • Install in seconds without tools
  • Two-piece design works with any 1” filter up to 25” long
  • Reusable, easy On/ easy Off design
  • 1 pack has 2 filter locks