depending on your unique home environment
Nordic Pure 16x25x5 Honeywell Replacement MERV 8 rated air filters are what is considered the traditional 5” filter at an actual 4 3/8”
Nordic Pure 16x24x4 MERV 15 Plus Carbon air filters are made of electrostatically charged synthetic materials with an added flat panel infused with activated charcoal that will attract and capture most airborne particulates in your home
We recommend that you change your air filter every 30-90 days to maintain maximum efficiency and indoor air quality
HVAC systems should be rated to handle filters of MERV 15 and above
17x21x1 Exact MERV 14 AC Furnace Filters Number Per Box:12 depending on your unique homeActual Size: 17 x 21 x 3 4 (17 x 21 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 14 Pleated AC