What is a MERV Rating?
Minimum Efficiency Reporting Value (MERV) is a scale designed to rate the effectiveness of air filters.
|MERV||Min. particle size||Typical controlled contaminant||Typical Application|
|17â€“20||< 0.3 Î¼m||Virus, carbon dust, sea salt, smoke||Electronics & pharmaceutical manufacturing cleanroom|
|13â€“16||0.3â€“1.0 Î¼m||Bacteria, droplet nuclei (sneeze), cooking oil, most smoke and insecticide dust, most face powder, most paint pigments||hospital & general surgery|
|9â€“12||1.0â€“3.0 Î¼m||Legionella, Humidifier dust, Lead dust, Milled flour, Auto emission particulates, Nebulizer droplets||Superior residential, better commercial, hospital laboratories|
|5â€“8||3.0â€“10.0 Î¼m||Mold, spores, dust mite debris, cat and dog dander, hair spray, fabric protector, dusting aids, pudding mix||Better residential, general commercial, industrial workspaces|
|1â€“4||> 10.0 Î¼m||Pollen, dust mites, cockroach debris, sanding dust, spray paint dust, textile fibers, carpet fibers||Residential window AC unit|