20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 14 Air Filters 4 Pack Amendment combined with increased perlite to

combined with increased perlite to provide excellent drainage

Quiet 24/7 air scrubbing – safe for patients and staff

This easy to use machine offers a full 8 hours of continuous tying per battery charge while avoiding carpel tunnel syndrome and repetitive motion injuries from hand twist tying

Nordic Pure 18x25x1 MERV 14 Plus Carbon air filters are made of electrostatically charged synthetic materials with an added flat panel infused with activated charcoal that attracts and capture most airborne particulates in your home

20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 14 Air Filters 4 Pack Amendment combined with increased perlite toImportant Note: Almost ALL furnace filters have a different "actual size" than the nominal size printed on the air conditioner filter. It's best if you measure your air filter for the EXACT size and compare it to our "Actual Size" and then you can be sure your A C air filter fits! With the 4" and 5" air filters there is a wider variance between the nominal and actual size depending on the manufacturer. We also carry 4 7 8 and 5 1 4 inch depth filters,