2,400+ Definitions
HVAC GLOSSARY
Every HVAC term, acronym, and industry phrase — defined in plain English.
Normalized Leakage
A dimensionless metric that relates measured envelope leakage area to…
Normally Closed Valve
A control valve configured so that it is fully closed…
Normally Open Valve
A control valve configured so that it is fully open…
NPLV
NPLV, or Non-Standard Part Load Value, is a single-number metric…