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Ranked by heating power kept at 5°f only

How much of its mild-weather heating power the unit still delivers at 5°F. At 100% the unit puts out as much heat at 5°F as at 47°F in the test. Lower means less heating output in deep cold. This list ranks by that one rating. For the units that hold up best in the cold overall, see the cold-climate picks.

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

Showing Ducted, 2 tons (21,000–26,999 Btu/h cooling). What size is my system?

Top 10 by heating power kept at 5°f only: ducted, 2 tons

Ranked by this one rating, not an overall verdict. Every model here is the same size and type, so the numbers compare directly. Higher is better. One certified pairing per model.
  1. 1RP15AY24AJ2Nwith ducted air handler AE*S+CM24A3J+TDRRheem (sold as RUUD)2 tons · 21,600 Btu/h · DuctedTop 10%134%
  2. 2RP15AY30AJ2Nwith ducted air handler AE*S+CM36A3J+TDRRheem (sold as RUUD)2 tons · 26,800 Btu/h · DuctedTop 10%134%
  3. 3WP15AY30AJ2Nwith ducted air handler PE(S,T)33JRheem (sold as Weatherking)2 tons · 25,600 Btu/h · DuctedTop 10%130%
  4. 4WP15AY24AJ2Nwith ducted air handler RE(S,T)24JRheem (sold as Weatherking)2 tons · 21,400 Btu/h · DuctedTop 10%128%
  5. 5GK-H02TC/NHA-D(U)GreeAlso sold as Ac Pro PKHP-X-024VBC, Tosot TK-H02TC/NHA-D(U)2 tons · 24,000 Btu/h · DuctedTop 10%126%
  6. 6MDPH18024DMRCOOL2 tons · 24,000 Btu/h · DuctedTop 10%126%
  7. 7SL22KLV-024-230A**with ducted air handler CBK48MVT-018/024-230-Lennox2 tons · 22,200 Btu/h · DuctedTop 10%122%
  8. 8KUSXB301Awith ducted air handler MSVT36***854GAALG2 tons · 26,000 Btu/h · DuctedBelow the middle114%
  9. 9AOUH24KUAH1with ducted air handler ARUH24KUASFujitsu2 tons · 24,000 Btu/h · DuctedTop 10%113%
  10. 105A6H7024A1with ducted air handler V,T36H***P42*+TXV+TDTrane (sold as American Standard)2 tons · 22,200 Btu/h · DuctedTop 10%112%

Every ducted, 2 tons model, highest first

Top cold-climate picks, ducted 2 tons

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

Want this size class’s full distribution and peer percentiles? Switch to Advanced

What good looks like: ducted, 2 tons

Good is better than half of this size class, great is the top quarter, top is the top 10%. The scale comes from the class’s own ratings.

  • Capacity at 5°F vs 47°F

    Heating power kept at 5°F

    How much of its mild-weather heating power the unit still delivers at 5°F.

    Good
    75%+
    Great
    86%+
    Top 10%
    96%+

  • COP at 5°F

    Efficiency on a 5°F day

    How much heat the unit makes from each unit of electricity when it is 5°F outside.

    Good
    2.00+
    Great
    2.18+
    Top 10%
    2.43+

  • HSPF2

    Winter-long heating efficiency

    Heating efficiency over a whole winter, measured with a federal test.

    Good
    8.8+
    Great
    9.5+
    Top 10%
    10.2+

Next steps

The advanced view adds the all-sizes boards, each qualifier’s peer percentiles, charts of every model in each size class, and the EER2 and heat output boards.

Open the advanced view