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Top cold-climate picks by size

Heat pumps that keep most of their heat when it is 5°F outside, ranked on three ratings at once against units their size: how much heat they keep, how efficient they are at 5°F, and how efficient they are over a whole winter (HSPF2).

Covers older R-410A heat pumps, no longer installed new. See models sold today · Updated

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

Top cold-climate picks, ductless 2 tons

Only units that keep at least 70% of their heat at 5°F, ranked on heat kept, efficiency at 5°F and seasonal efficiency (HSPF2), against units their size.

375 of 699 models in this size class qualify. 233 keep less than 70% of their heat at 5°F and 88 have no 5°F heat output rating, so they cannot show it.

  1. 1ARUN024GSS4LG2 tons · 24,000 Btu/h · DuctlessKeeps 104% of its heat at 5°FMeets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP, ENERGY STAR CC
    Heat kept at 5°F
    104% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    3.59 (COP at 5°F)
    Top 10%
    Seasonal efficiency
    10.2 (HSPF2)
    Great
    92.9score / 100
  2. 2AOUH24LMAS1with ductless indoor unit ASUH24LMASFujitsu2 tons · 22,000 Btu/h · DuctlessKeeps 116% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    116% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.08 (COP at 5°F)
    Good
    Seasonal efficiency
    11.4 (HSPF2)
    Top 10%
    89.0score / 100
  3. 3AOU24RGLXwith ductless indoor unit AUU24RGLXFujitsu2 tons · 24,000 Btu/h · DuctlessKeeps 97% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    97% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    2.97 (COP at 5°F)
    Top 10%
    Seasonal efficiency
    10.1 (HSPF2)
    Great
    88.6score / 100
  4. 4RO1HHZ24AJ2Swith ductless indoor unit UIWHHZ24AJ2SRheem (sold as RUUD)2 tons · 22,000 Btu/h · DuctlessKeeps 101% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    101% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.08 (COP at 5°F)
    Good
    Seasonal efficiency
    11.4 (HSPF2)
    Top 10%
    87.3score / 100
  5. 5SENA/24HF/OQwith ductless indoor unit SENA/24HF/ICQSenville2 tons · 24,000 Btu/h · DuctlessKeeps 103% of its heat at 5°FMeets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP, ENERGY STAR CC
    Heat kept at 5°F
    103% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    11.5 (HSPF2)
    Top 10%
    86.1score / 100
  6. 638MARBQ24AA3with ductless indoor unit 40MBCAQ24XA3CarrierAlso sold as Midea 38MARBQ24AA3, Midea DLCSRBH24AAK, MDV MOD30-24HFN1-MU0W, Arcoaire DLCSRBH24AAK and 2 more2 tons · 24,000 Btu/h · DuctlessKeeps 103% of its heat at 5°FMeets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP, ENERGY STAR CC
    Heat kept at 5°F
    103% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    11.5 (HSPF2)
    Top 10%
    86.1score / 100
  7. 7MLB024S4S-1Pwith ductless indoor unit M33C024S4-1PLennoxAlso sold as Comfort-Aire A-VMH24SV-12 tons · 24,000 Btu/h · DuctlessKeeps 103% of its heat at 5°FMeets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP, ENERGY STAR CC
    Heat kept at 5°F
    103% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    11.5 (HSPF2)
    Top 10%
    86.1score / 100
  8. 8CH-HPR24-230VOwith ductless indoor unit CH-N24MSPHCT-230VICooper&Hunter (sold as C&H)2 tons · 24,000 Btu/h · DuctlessKeeps 103% of its heat at 5°FMeets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP, ENERGY STAR CC
    Heat kept at 5°F
    103% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    11.5 (HSPF2)
    Top 10%
    86.1score / 100
  9. 9BMS500-AAS024-1CSXHCwith ductless indoor unit BMS500-AAU024-1AHCXCBosch2 tons · 24,000 Btu/h · DuctlessKeeps 103% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    103% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    11.5 (HSPF2)
    Top 10%
    86.1score / 100
  10. 10BZ33-HYP24OUT2-G2-Pwith ductless indoor unit BZ33-CASS24-G2-PBreeze33Also listed as HSZ24H424ZMO2 tons · 24,000 Btu/h · DuctlessKeeps 103% of its heat at 5°FMeets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP, ENERGY STAR CC
    Heat kept at 5°F
    103% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    11.5 (HSPF2)
    Top 10%
    86.1score / 100

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

Want every qualifier’s peer percentiles and the all-sizes board? Switch to Advanced

What good looks like: ductless, 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
    89%+
    Top 10%
    100%+

  • 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
    1.87+
    Great
    2.10+
    Top 10%
    2.21+

  • HSPF2

    Winter-long heating efficiency

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

    Good
    9.0+
    Great
    10.0+
    Top 10%
    10.6+

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.

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