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.
The best place to start on your furnace is with the filter. A dirty filter will cause excessive strain on your furnace, increase heating costs and reduce the life of your equipment. Make sure that your furnace filter has a cover over the slot, ensuring an efficient return-air system.