Air Filter Merv Ratings: MERV_11 to MERV_15
ASHRAE MERV rating cross-reference per ANSI/ASHRAE Standard 52.2 — MERV 1 through 16 with efficiency range group (E-1/E-2/E-3), particle size range controlled, arrestance value (MERV 1-4), example contaminants, typical HVAC applications, and representative filter media types.
| merv rating | efficiency range group | example contaminants | filter types | standard | typical applications |
|---|---|---|---|---|---|
| MERV_11 | E-2 | 1.0 to 3.0 µm size range: milled flour; lead dust; combustion soot; Legionella; coal dust; some bacteria; process grinding dust | Box-style wet-laid or lofted fiberglass; box-style synthetic media; minipleated synthetic or fiberglass paper; depths from 2 to 12 in. Pocket filters either rigid or flexible in synthetic or fiberglass; depths from 12 to 36 in. | ASHRAE 52.2-2017 | Food processing facilities; air separation plants; commercial buildings; better residential; industrial air cleaning; prefiltration to higher-efficiency filters; schools; gymnasiums |
| MERV_12 | E-2 | 1.0 to 3.0 µm size range: milled flour; lead dust; combustion soot; Legionella; coal dust; some bacteria; process grinding dust | Box-style wet-laid or lofted fiberglass; box-style synthetic media; minipleated synthetic or fiberglass paper; depths from 2 to 12 in. Pocket filters either rigid or flexible in synthetic or fiberglass; depths from 12 to 36 in. | ASHRAE 52.2-2017 | Food processing facilities; air separation plants; commercial buildings; better residential; industrial air cleaning; prefiltration to higher-efficiency filters; schools; gymnasiums |
| MERV_13 | E-1 | 0.3 to 1.0 µm size range: bacteria; smoke (ETS); paint pigments; face powder; some virus; droplet nuclei; insecticide dusts; soldering fumes | Box-style wet-laid or lofted fiberglass; box-style synthetic media; minipleated synthetic or fiberglass paper; depths from 2 to 12 in. Pocket filters of fiberglass or synthetic media 12 to 36 in. | ASHRAE 52.2-2017 | Day surgery; general surgery; hospital general ventilation; turbo equipment; compressors; welding/soldering air cleaners; prefilters to HEPAs; LEED commercial buildings; smoking lounges |
| MERV_14 | E-1 | 0.3 to 1.0 µm size range: bacteria; smoke (ETS); paint pigments; face powder; some virus; droplet nuclei; insecticide dusts; soldering fumes | Box-style wet-laid or lofted fiberglass; box-style synthetic media; minipleated synthetic or fiberglass paper; depths from 2 to 12 in. Pocket filters of fiberglass or synthetic media 12 to 36 in. | ASHRAE 52.2-2017 | Day surgery; general surgery; hospital general ventilation; turbo equipment; compressors; welding/soldering air cleaners; prefilters to HEPAs; LEED commercial buildings; smoking lounges |
| MERV_15 | E-1 | 0.3 to 1.0 µm size range: bacteria; smoke (ETS); paint pigments; face powder; some virus; droplet nuclei; insecticide dusts; soldering fumes | Box-style wet-laid or lofted fiberglass; box-style synthetic media; minipleated synthetic or fiberglass paper; depths from 2 to 12 in. Pocket filters of fiberglass or synthetic media 12 to 36 in. | ASHRAE 52.2-2017 | Day surgery; general surgery; hospital general ventilation; turbo equipment; compressors; welding/soldering air cleaners; prefilters to HEPAs; LEED commercial buildings; smoking lounges |
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