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1HVAC vs THERMAL ZONE: heat pump ratings compared

Against heat pumps of the same size and type, a typical 1HVAC model beats 61% and a typical THERMAL ZONE model 30%. 1HVAC rates higher overall.

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

1HVAC

61%

of similar heat pumps beaten by its typical model

Well above average

70 models listed

THERMAL ZONE

30%

of similar heat pumps beaten by its typical model

Well below average

101 models listed

Rating by ratingEach bar is the share of same-size, same-type heat pumps that a typical model beats, so the two brands compare fairly even if they make different sizes.
  • Efficiency on a 5°F dayCOP at 5°F1HVAC: Beats 57%THERMAL ZONE: Beats 40%
  • Heating power kept at 5°FCapacity at 5°F vs 47°F1HVAC: Beats 59%THERMAL ZONE: Beats 26%
  • Winter-long heating efficiencyHSPF21HVAC: Beats 71%THERMAL ZONE: Beats 23%
  • Summer-long cooling efficiencySEER21HVAC: Beats 64%THERMAL ZONE: Beats 24%
  • Hot-day cooling efficiencyEER21HVAC: Beats 55%THERMAL ZONE: Beats 31%

Average (50%)Dashed outline: the other brand, for comparison

Want ranks, distributions per size class and cold-weather curves? Switch to Advanced

Rebate standards

Share of each brand’s models that meet the level. Programs can have other rules too.

  • CEE 2025

    1HVAC
    87%
    THERMAL ZONE
    8%

  • Xcel CC

    1HVAC
    74%
    THERMAL ZONE
    8%

  • CEE Advanced

    1HVAC
    4%
    THERMAL ZONE
    0%

  • ENERGY STAR CC

    1HVAC
    77%
    THERMAL ZONE
    8%

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.

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

1HVAC

  1. 1ACIQ-24ZPL-HP230Cwith ductless indoor unit ACIQ-24CC-HH-MC1HVAC2 tons · 23,400 Btu/h · DuctlessKeeps 95% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    95% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    2.23 (COP at 5°F)
    Great
    Seasonal efficiency
    11.6 (HSPF2)
    Top 10%
    89.4score / 100
  2. 2ACIQ-24ZS-HP230Cwith ductless indoor unit ACIQ-24WS-HP230C1HVAC2 tons · 24,000 Btu/h · DuctlessKeeps 71% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    71% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.15 (COP at 5°F)
    Great
    Seasonal efficiency
    10.0 (HSPF2)
    Good
    63.5score / 100
  3. 3ACIQ-24Z-HP230Cwith ductless indoor unit ACIQ-24W-HP230C1HVAC2 tons · 24,000 Btu/h · DuctlessKeeps 71% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    71% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.14 (COP at 5°F)
    Great
    Seasonal efficiency
    9.3 (HSPF2)
    Below the middle
    48.0score / 100

THERMAL ZONE

No ductless, 2 tons model from THERMAL ZONE.

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

Next steps

The advanced view adds ranks, both brands’ models inside every size class, standout models per rating and cold-weather curves.

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