27140 County 6 Fountain, MN 55935: 27165 County 6 Fountain, MN 55935: 27223 County 6 Fountain, MN 55935: 27241 County 6 Fountain, MN 55935: 27276 County 6 Fountain, MN 55935: 27821 County 6 Fountain, MN 55935: 28823 County 6 Fountain, MN 55935: 29420 County 6 Fountain, MN 55935: 29559 County 6 Fountain, MN 55935: 29739 County 6 Fountain, MN 55935: 30270 County 6 Fountain, MN 55935
MERV ratings range from 1 â 16 and measurements are in microns. Some of the common particles related to MERV ratings are pet dander, insecticide dust, smog, dust, viruses, wood, tobacco smoke, spores, bacteria and pollen. Some of the most common filters found in residential use only have a merv rating of 1 to 4.
Dri EazÂ® 1st Stage Pre-filter F270 for HEPA 500. For use with the Dri-Eaz HEPA 500. The first-stage pre-filter uses synthetic fiber filter media rated at 10% efficiency. The filter captures the largest particles to help extend the life of the higher efficiency filters inside.Sold as single units.ri EazÂ® 1st Stage Pre-filter F270 for HEPA 500. For use with the Dri-Eaz HEPA 500. The first-stage pre-filter uses synthetic fiber filter media rated at 10% efficiency. The filter captures the largest particles to help extend the life of the higher efficiency filters inside. Sold as single units.