18x22x1 MERV 12 AC Furnace Filters Number Per Box:12 while these filters are larger

while these filters are larger at 5 1/4”

and other contaminants

Replaced approximately every 30 to 60 days for fresh clean air

dust mites

Nordic Pure 16x25x5 Honeywell Replacement MERV 12 rated air filters are what is considered the traditional 5” filter at an actual 4 3/8”

18x22x1 MERV 12 AC Furnace Filters Number Per Box:12 while these filters are largerActual 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