FilterLOCK
Saves energy and reduces energy bills
Improves indoor air quality
Blocks allergens and other contaminants, including deadly gases like carbon monoxide and radon from entering the HVAC system at the air filter slot.
Universal one size fits all
Reusable, easy on / easy off design
Magnetically attaches to the duct work
Two piece design is 4-3/4"" wide and works with any 1"" filter up to 25"" long
AirFilters.com
Installation: Simply remove FilterLock from the package and cover the filter slot, letting the two pieces overlap in the center of the slot opening. Built-in magnets hold FilterLock securely in place.
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