Field glossary

HEPA

High Efficiency Particulate Air, 99.97 percent capture at 0.3 micron, the most penetrating particle size

Used across 3 Anvilfield field guides, most in HVAC.

Also defined as

Concrete: High-efficiency particulate air filter rated 99.97 percent capture at 0.3 micron, the common filter for silica dust collectors

Where this shows up