Furnace Filter Ratings Merv Vs Mpr

It s why we created a different measurement microparticle performance rating mpr.

Furnace filter ratings merv vs mpr.

Scientists at 3m believe that merv only tells part of the story. Fpr rating systems air filter ratings explained. For example a merv 4 filter removes dust lint and pollen. Microparticles are not even measured on the merv scale until it reaches merv 11.

Mpr micro particle performance rating. The mpr scale however uses much larger numbers. Their basic filter is rated at 100 and their most efficient filter is rated at 2800. The mpr 2800 would qualify as a merv 14 so even though 3m emphasizes the smallest size range of particles their best filter doesn t qualify for the highest merv rating.

Exclusive filtrete brand filter technology focuses on capturing the tiniest particles between 0 3 and 1 micron µm in size. However a merv 13 filter removes those as well as dust mites mold pet dander smoke smog viruses bacteria and more. What is the difference between merv mpr and fpr air filter ratings. Typical merv ratings for furnace filters are 4 8 11 or 13 with various pollutants removed at each level of filtration.

For reference a typical dust particle is between 2 and 8 microns while pollen starts at 7 microns and can get up to 70 microns in size. While merv ratings reflect a filter s ability to trap both microscopic and macroscopic particles mpr ratings only grade a filter on its capacity to remove particles from 0 3 to 1 microns. This rating system was developed by the company 3m designed to rate the manufacturer s filters and their ability to capture airborne particles smaller than 1 micron. This rating includes microscopic particles not visible to the naked eye.