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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, 3.5–4.5 tons: every model, highest efficiency on a 5°f day first

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

Showing Ducted, 3.5–4.5 tons (39,000–56,999 Btu/h cooling). What size is my system?

  1. 1951K18HVH48WD2UN3with ducted air handler K18HVH48WD2HN3KeplerX4 tons · 48,000 Btu/h · DuctedBelow the middle1.75
  2. 1952EL18KSLV-060-230**with ducted air handler LH40/61W*+TXV+LEFE5Lennox4 tons · 47,500 Btu/h · DuctedBelow the middle1.75
  3. 1953LRP15HPK48VP-*Lennox4 tons · 45,000 Btu/h · DuctedBelow the middle1.75
  4. 1954RPHPV-71548P-*Lennox (sold as Armstrong Air)4 tons · 45,000 Btu/h · DuctedBelow the middle1.75
  5. 1955CSH4BE5M1SP42Kwith ducted air handler B65BMMX42K*CNortek Global HVAC (sold as Maytag)3.5 tons · 40,500 Btu/h · DuctedBelow the middle1.75
  6. 1956CSH4BE5M1SP48Kwith ducted air handler B65EMMX48K*CNortek Global HVAC (sold as Maytag)4 tons · 46,500 Btu/h · DuctedBelow the middle1.75
  7. 1957FSH4BE5M1SP42Kwith ducted air handler B65BMMX42K*CNortek Global HVAC (sold as Frigidaire)3.5 tons · 40,500 Btu/h · DuctedBelow the middle1.75
  8. 1958FSH4BE5M1SP48Kwith ducted air handler B65EMMX48K*CNortek Global HVAC (sold as Frigidaire)4 tons · 46,500 Btu/h · DuctedBelow the middle1.75
  9. 1959FSH4BF5M2SX48Kwith ducted air handler B65VMMX3648K*CNortek Global HVAC (sold as Frigidaire)4 tons · 45,500 Btu/h · DuctedBelow the middle1.75
  10. 1960FSH4BF5M2SX60Kwith ducted air handler B65VMMX60K*CNortek Global HVAC (sold as Frigidaire)4.5 tons · 53,500 Btu/h · DuctedBelow the middle1.75
  11. 1961HSH4ME5M1SP42Kwith ducted air handler C85DAMX43U*BNortek Global HVAC (sold as Intertherm)3.5 tons · 40,500 Btu/h · DuctedBelow the middle1.75
  12. 1962HSH4ME5M1SP48Kwith indoor coil C85DAMX4960U-B and furnace E7E*-0**HNortek Global HVAC (sold as Intertherm)4 tons · 46,000 Btu/h · DuctedBelow the middle1.75
  13. 1963PSH4BE5M1SP42Kwith ducted air handler B65BMMX42K*CNortek Global HVAC (sold as Maytag)3.5 tons · 40,500 Btu/h · DuctedBelow the middle1.75
  14. 1964PSH4BE5M1SP48Kwith ducted air handler B65EMMX48K*CNortek Global HVAC (sold as Maytag)4 tons · 46,500 Btu/h · DuctedBelow the middle1.75
  15. 1965PSH4BF5M2SX48Kwith ducted air handler B65VMMX3648K*CNortek Global HVAC (sold as Maytag)4 tons · 45,500 Btu/h · DuctedBelow the middle1.75
  16. 1966PSH4BF5M2SX60Kwith ducted air handler B65VMMX60K*CNortek Global HVAC (sold as Maytag)4.5 tons · 53,500 Btu/h · DuctedBelow the middle1.75
  17. 1967SH4BE5M1SP42Kwith ducted air handler B65BMMX42K-CNortek Global HVAC (sold as Nordyne)3.5 tons · 40,500 Btu/h · DuctedBelow the middle1.75
  18. 1968SH4BE5M1SP48Kwith ducted air handler B65EMMX48K-CNortek Global HVAC (sold as Nordyne)4 tons · 46,500 Btu/h · DuctedBelow the middle1.75
  19. 1969SH4BF5M2SX48Kwith ducted air handler B65VMMX3648K-CNortek Global HVAC (sold as Nortek Global Hvac Llc)4 tons · 45,500 Btu/h · DuctedBelow the middle1.75
  20. 1970SH4BF5M2SX60Kwith ducted air handler B65VMMX60K-CNortek Global HVAC (sold as Nortek Global Hvac Llc)4.5 tons · 53,500 Btu/h · DuctedBelow the middle1.75
  21. 1971SH4ME5M1SP42Kwith ducted air handler C85DAMX43U-BNortek Global HVAC (sold as Nordyne)3.5 tons · 40,500 Btu/h · DuctedBelow the middle1.75
  22. 1972SH4ME5M1SP48Kwith indoor coil C85DAMX4960U-B and furnace E7E*-0**HNortek Global HVAC (sold as Nordyne)4 tons · 46,000 Btu/h · DuctedBelow the middle1.75
  23. 1973WSH4BE5M1SP42Kwith ducted air handler B65BMMX42K*CNortek Global HVAC (sold as Frigidaire)3.5 tons · 40,500 Btu/h · DuctedBelow the middle1.75
  24. 1974WSH4BE5M1SP48Kwith ducted air handler B65EMMX48K*CNortek Global HVAC (sold as Frigidaire)4 tons · 46,500 Btu/h · DuctedBelow the middle1.75
  25. 1975HSH4ME5M1SP42Kwith ducted air handler C85DAMX43U*BREVOLV3.5 tons · 40,500 Btu/h · DuctedBelow the middle1.75

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