30 and 1 micron in size (most smoke, sneeze nuclei May 4, 2017 · The MERV rating tells you what percent of particles in that size range the filter will capture
3 microns and above (HEPA Here’s a good way to compare FPR vs
MERV Rating
MERV Rating
0 Microns 3
Particle Size Arrestance Dust-Spot Dust-Spot Typical Typical Most Common Most
About Air Filter Efficiency Ratings
A MERV 13 filter traps at its minimum efficiency - less than 75% of air
MPR (Microparticle Performance Rating): Designed to measure the capture of more
A
Use this rating system compare filters made by different manufacturers
1 Micron = 1 Thousandth of a Millimeter
High Efficiency Particulate Air (HEPA) filters with MERV ratings from 17 to 20 are more effective at filtering out smaller particles, including viruses
The MERV 11 filter is better at capturing pet dander and bacteria from sneezes
EN 779:2012
Coarse Filters Average Arrestance (Am) Final Test Pressure Drop 250 [Pa] Medium- and Fine Filters Average Efficiency (Em) and Minimum Efficiency (M
000001m)
PM10 – 3
0 micron
3 microns)
The high end of the scale is MERV-16
Pros
3 microns (µm)
Every level of MPR-rated filters requires the capture of microscopic particles, from MPR 300 - 2800
Knowing about MERV ratings isn’t always enough when you need to buy a furnace filter
Efficiency Rating MERV* 15 per ASHRAE 52