MERV Rating - Actual Particle Size Removed and Efficiency in Percentage

MERV Rating	0.3 – 1.0 Microns*	1.0 – 3.0 Microns	3.0 – 10.0 Microns
1	-	-	<20%
2	-	-	<20%
3	-	-	<20%
4	-	-	<20%
5	-	-	<20-35%
6	-	-	<35-50%
7	-	-	<50-70%
8	-	-	>70%
9	-	<50%	>85%
10	-	50-65%	>85%
11	-	65-80%	>85%
12	-	<80%	>90%
13	<75%	<90%	>90%
14	75-85%	<90%	>90%
15	85-95%	<90%	>90%
16	<95%	<95%	>95%

*A human hair is roughly 20-40 microns in size, while viruses (the smallest airborne microbes) range in size from .01 to 0.3 micron.

MERV Rating: Actual Particle Size Removed and Efficiency in Percentage