Field glossary

MERV

Minimum Efficiency Reporting Value, the filter's particle-capture rating; higher is finer and more restrictive

Used across 4 Anvilfield field guides, most in HVAC.

Also defined as

Datacenter: Minimum Efficiency Reporting Value, the particulate filter rating; gas-phase media is rated separately
Minimum Efficiency Reporting Value, the filter efficiency rating; higher catches finer particles

Where this shows up