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Check a heat pump’s certified ratings

Type the outdoor unit’s model number from its nameplate, or the AHRI reference number from your quote. You will see its ratings, how it compares with others of its size, and the rebate standards it meets.

Covers heat pumps sold new today (R-454B and R-32 refrigerant). See older R-410A models · Updated

Partial model numbers work. AHRI numbers find the pairing listed for each model.

Ducted, 2.5–3 tons: every model, highest efficiency on a 5°f day first

One size class at a time, so the numbers compare directly.

Showing Ducted, 2.5–3 tons (27,000–38,999 Btu/h cooling). What size is my system?

  1. 951KOB-HH-PS436HP-2AAMAKaden3 tons · 36,000 Btu/h · DuctlessGood2.00
  2. 952KOB-HH-PS536HP-2AAMAKaden3 tons · 36,000 Btu/h · DuctlessGood2.00
  3. 953KOB-PS327HP-2AAMAKaden2.5 tons · 27,000 Btu/h · DuctlessGood2.00
  4. 954KOB-PS427HP-2AAMAKaden2.5 tons · 27,000 Btu/h · DuctlessGood2.00
  5. 955KOB-PS436HP-2AAMAKaden3 tons · 36,000 Btu/h · DuctlessGood2.00
  6. 956KOB-PS536HP-2AAMAKaden3 tons · 36,000 Btu/h · DuctlessGood2.00
  7. 957KOB-UUX30HP-2AAMAwith ducted air handler KIB-UUX30AH-2AAMAKaden2.5 tons · 30,000 Btu/h · DuctedGood2.00
  8. 958KOB-UUX36HP-2AAMAwith ducted air handler KIB-UUX36AH-2AAMAKaden3 tons · 36,000 Btu/h · DuctedGood2.00
  9. 959KWSMO-27IR454BHS20KANIONco2.5 tons · 27,000 Btu/h · DuctlessGood2.00
  10. 960KWSMO-36IR454BHS19KANIONco3 tons · 35,000 Btu/h · DuctlessGood2.00
  11. 961KEENHYZHP27AAKEEN Home2.5 tons · 28,000 Btu/h · DuctedGood2.00
  12. 962KEENHYZHP36AAKEEN Home3 tons · 36,000 Btu/h · DuctedGood2.00
  13. 963KEENSTDHP36AAwith ducted air handler KEENHYDAH36AAKEEN Home3 tons · 36,000 Btu/h · DuctedGood2.00
  14. 964KEENSTZHP37AAKEEN Home3 tons · 35,000 Btu/h · DuctlessGood2.00
  15. 965K20HVH36WD2VN3with ducted air handler K20HVH36WD2HN3KeplerX3 tons · 36,000 Btu/h · DuctedGood2.00
  16. 966A-KHP284A-1Kerr2.5 tons · 27,000 Btu/h · DuctlessGood2.00
  17. 967A-KHP33SA-1with ducted air handler B-KHP30AA-1Kerr3 tons · 33,000 Btu/h · DuctedGood2.00
  18. 968A-KHP365A-1Kerr3 tons · 36,000 Btu/h · DuctlessGood2.00
  19. 969KMHR427-H225-4KLIMAIRE2.5 tons · 28,000 Btu/h · DuctedGood2.00
  20. 970KMHR536-H224-4KLIMAIRE3 tons · 36,000 Btu/h · DuctedGood2.00
  21. 971KMIR536-H224-4KLIMAIRE3 tons · 35,000 Btu/h · DuctlessGood2.00
  22. 972GLZS4BA3010A*with ducted air handler AMST30BU1300ALegacy Systems2.5 tons · 28,400 Btu/h · DuctedGood2.00
  23. 973GLZS4MA3010A*with ducted air handler AMST30BU1300ALegacy Systems2.5 tons · 28,600 Btu/h · DuctedGood2.00
  24. 974A-VHP284A-1Lennox (sold as Comfort-Aire)2.5 tons · 27,000 Btu/h · DuctlessGood2.00
  25. 975A-VHP33SA-1with ducted air handler B-VHP30AA-1Lennox (sold as Comfort-Aire)3 tons · 33,000 Btu/h · DuctedGood2.00

These are certified test ratings, not a recommendation for your home. The right size comes from a load calculation by a contractor.

What size is my system?

Tons and Btu

A heat pump’s size is its rated cooling output, in Btu per hour. Installers talk in tons: one ton is 12,000 Btu per hour, so a 3-ton unit is about 36,000.

Where to find yours: the nameplate sticker on the outdoor unit lists the model number. Many model numbers include the size in thousands of Btu, such as 24 (2 tons), 36 (3 tons) or 48 (4 tons). Your quote or AHRI certificate also lists it. Look up a model number

These are certified test ratings, not a recommendation for your home. The right size comes from a load calculation by a contractor.

Size classes used here

  • Up to 1.5 tonsunder 21,000 Btu/h
  • 2 tons21,000–26,999 Btu/h
  • 2.5–3 tons27,000–38,999 Btu/h
  • 3.5–4.5 tons39,000–56,999 Btu/h
  • 5 tons and up57,000 Btu/h and up

The advanced view lists every model with filters for brand, standard, size and type, sortable by any rating.

Open the advanced view