12x15x1 MERV 14 AC Furnace Filters (3 5/8) Particles in indoor air are

Particles in indoor air are measured in microns

Actual Size: 9 1/2 x 29 1/2 x 1/2 (9

We recommend changing your HVAC furnace filter every 1-3 months

Actual Size: 11 1/2 x 21 x 3/4 (11

12x15x1 MERV 14 AC Furnace Filters (3 5/8) Particles in indoor air areActual Size: 11 1 2 x 14 1 2 x 3 4 (11. 5 x 14. 5 x 0. 75) Airborne dust, pollen, mold spores, pet dander, smog, dust mite debris, smoke, and bacteria are captured and removed. Ideal for customers with health problems or for commercial units which support a rating of MERV 14 and above Hypoallergenic, antimicrobial, and electrostatic filter media. Moisture resistant frame. Nordic Pure MERV 14 is equivalent to MPR 2800 Made in the USA. Nordic Pure MERV