18x22x1 MERV 12 AC Furnace Filters Number Per Box:12 and other contaminants

and other contaminants

Actual Size: 17 x 23 x 3/4 (17 x 23 x 0

a 5” filter is actually a fraction of an inch smaller

Replaced approximately every 30 to 60 days for fresh clean air

18x22x1 MERV 12 AC Furnace Filters Number Per Box:12 and other contaminantsActual Size: 17 1 2 x 21 1 2 x 3 4 (17. 5 x 21. 5 x 0. 75) Removes lint, household dust, pollen, smoke particles, dust mites, pet dander, virus carriers, mold spores and other contaminants. Ideal for high efficiency air filtration and will help those with moderate allergies and asthma. Hypoallergenic, antimicrobial, and electrostatic filter media. Moisture resistant frame. Nordic Pure MERV 12 is equivalent to MPR 1500 1900 Made in the USA. Nordic Pure