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If you are replacing a Honeywell or Lennox 20x25x4 Plus Carbon or an air filter with an MPR rating with an actual depth of 4 3/8
Actual Size: 7 1/2 x 11 1/2 x 3/4 (7
Actual Size: 14 1/2 x 18 1/2 x 3/4 (14
so please make sure you order the correct size
the efficiency of all air filters is rated according to the same criteria as set forth by ASHRAE
30x30x1 Exact MERV 14 AC Furnace Filters Number Per Box:6 If you are replacing aActual Size: 30 x 30 x 3 4 (30 x 30 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
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