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Air Filter Merv Ratings: MERV 4
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 | arrestance value | efficiency range group | example contaminants | filter types | standard | typical applications |
|---|---|---|---|---|---|---|
| MERV 4 | >70% | E-3 | Arrestance method — 3.0 to 10 µm size range | Inertial separators | ASHRAE 52.2-2017 | Protection from blowing large particle dirt and debris; industrial environment ventilation air |
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Get started for free ↗Reference Data375 engineering tablesMaterial properties, pipe and shape dimensions, code tables, and electrical ratings across mechanical, civil, chemical, electrical, materials, and manufacturing engineering.
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