TL;DR
Superheat is the number of degrees a refrigerant vapor's temperature rises above its boiling (saturation) point, measured by comparing suction-line temperature with the saturation temperature derived from suction pressure. It proves the refrigerant fully evaporated before reaching the compressor, which liquid would destroy; on fixed-orifice systems technicians charge to a target superheat from the manufacturer's chart.
What it means
Superheat is the number of degrees a refrigerant vapor's temperature rises above its boiling (saturation) point, measured by comparing suction-line temperature with the saturation temperature derived from suction pressure. It proves the refrigerant fully evaporated before reaching the compressor, which liquid would destroy; on fixed-orifice systems technicians charge to a target superheat from the manufacturer's chart. Readings near zero warn of floodback, while very high values reveal a starved evaporator from undercharge or poor airflow.
Where it sits in the glossary
Superheat is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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