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the efficiency of all air filters is rated according to the same criteria as set forth by ASHRAE
clean air in your home and office
MERV 8 furnace filters are comparable to HVAC filters with the rating of MPR 800
Nordic Pure MERV 12 is equivalent to MPR 1500-1900
People with pets or those who suffer from allergies should change their A/C air filters more often
8 1/2x30x1 Exact MERV 13 Plus Carbon AC Furnace Filters Number Per Box:6 the efficiency of all airActual Size: 8 1 2 x 30 x 3 4 (8. 5 x 30 x 0. 75) Removes lint, household dust, pollen, smoke particles, dust mites, pet dander, smog, virus carriers, mold spores, help eliminate unwanted odors and other contaminants. Ideal for customers looking for superior filtration but needing an odor control element Hypoallergenic, antimicrobial, and electrostatic filter media. Moisture resistant frame. Nordic Pure MERV 13 is equivalent to MPR 2200 2400 Made in