2,400+ Definitions

HVAC GLOSSARY

Every HVAC term, acronym, and industry phrase — defined in plain English.

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Scroll Compressor
A scroll compressor uses two interleaved spiral-shaped scrolls to compress…
Seasonal Energy Efficiency Ratio (SEER)
SEER (Seasonal Energy Efficiency Ratio) was the primary efficiency rating…
SEER2
Seasonal Energy Efficiency Ratio 2 (SEER2) is the updated federal…
Subcooling
Subcooling is the temperature decrease of a liquid refrigerant below…
Superheat
Superheat is the temperature increase of a vapor above its…