TL;DR
SEER2 is the federal seasonal cooling-efficiency metric for residential air conditioners and heat pumps, calculated as cooling output over a season divided by electricity consumed, under the M1 test procedure with higher external static pressure than the old SEER test. Since 2023 the national floor is 13.4 SEER2 in northern states and 14.3 in the South and Southwest; high-efficiency units exceed 20.
What it means
SEER2 is the federal seasonal cooling-efficiency metric for residential air conditioners and heat pumps, calculated as cooling output over a season divided by electricity consumed, under the M1 test procedure with higher external static pressure than the old SEER test. Since 2023 the national floor is 13.4 SEER2 in northern states and 14.3 in the South and Southwest; high-efficiency units exceed 20. The rating, certified under AHRI 210/240, appears on the yellow EnergyGuide label and drives most rebate eligibility.
Where it sits in the glossary
SEER2 is part of the Certifications 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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