FilterLock.

FILTERLOCK BENEFITS:

  • Saves Energy and Reduces Utility Bills

  • Improves Indoor Air Quality

  • Blocks Allergens and Contaminates From Entering Duct System

  • Year-Round Protection and Savings

FILTERLOCK FEATURES:

  • Universal Fit - Adjusts to Fit all Standard One Inch Air Filters

  • Reusable: Easy-On and Easy-Off

  • Magnetically Attaches to Metal Ducts

BEFORE

AFTER

INSTALLATIONS INSTRUCTIONS:

FilterLOCK® seals standard furnace and A/C filter slots. Overlapping two-piece design fits filters up to 25". Built-in magnetic fasteners hold FilterLOCK securely in place on top or side of metal duct.

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FAQs

  • FilterLOCK reduces utility costs (heat and cool) by causing return air to be drawn from finished rooms as designed instead of drawn at the open filter slot.

  • An open filter slot can allow radon, allergens, dust, and other contaminates to be sucked in and distributed through your duct system. Covering your open filter slot will also reduce your utility bills by helping your heating and cooling system work more efficiently. 

  • FilterLOCK will fit up to 25” filter slots (1” wide filters).

  • FilterLOCK has magnets hemmed into the perimeter on both sides and one end to magnetically secure to metal ducts.

  • Yes, FilterLOCK is manufactured with an overlapping design to cover various sizes from 10” up to 25”.

  • FilterLOCK seals the filter slot to cause return air to flow through the duct system and filter as designed instead of bypassing the filter at the open slot.

  • Yes, FilterLOCKs attach and reattach quickly and easily.

  • Yes, some slots are configured where one side of the FilterLOCK can not lap over the edge of the duct. FilterLOCK can be cut (through the magnets too) and modified to fit as needed.

  • No, many users write a filter change reminder date on FilterLOCK with a felt tipped pen.