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THERMAL ZONE heat pumps: how do their ratings compare?

A typical THERMAL ZONE heat pump beats 30% of similar heat pumps (same size and type), which is well below average. THERMAL ZONE has 101 heat pump models in this list.

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

Overall score

30%

of similar heat pumps beaten by its typical model

Well below average

THERMAL ZONE has no QMID (the manufacturer ID the 25C tax credit needs) on file, so it is not ranked against other brands. Based on 60 models with every rating.

THERMAL ZONE, rating by ratingStrongest on efficiency on a 5°f day (beats 40%), weakest on winter-long heating efficiency (beats 23%).
  • Efficiency on a 5°F dayCOP at 5°FBeats 40%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FBeats 26%
  • Winter-long heating efficiencyHSPF2Beats 23%
  • Summer-long cooling efficiencySEER2Beats 24%
  • Hot-day cooling efficiencyEER2Beats 31%

Average (50%)

Each bar: the share of similar heat pumps a typical model beats on that rating.

Want THERMAL ZONE’s ranks and its models inside every size class? Switch to Advanced

Rebate standards

Share of this brand’s models that meet the efficiency levels rebate programs use. Programs can have other rules too.

  • 8%

    meet CEE 2025 Tier 1, the level many utility rebates use.

    8 models. All brands: 57%.

    See them

  • 8%

    meet Xcel Energy Colorado’s cold-climate rebate levels.

    8 models. All brands: 53%.

    See them

  • 0%

    reach the cold-climate tier: full heating output and a COP of 2.1 or more at 5°F.

    None of its models yet. All brands: 3%.

THERMAL ZONE all-around best, by size

Balances heating (5°F output and efficiency, HSPF2) and cooling (SEER2, EER2), each rating against units their size.

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

12 of THERMAL ZONE’s 12 models of this size and type have all five ratings.

  1. 1TZID36H520ZCwith ducted air handler TZID24H520ZATHERMAL ZONE2 tons · 24,000 Btu/h · DuctedCold-climate pick, score 69.4Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    83% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.10 (COP at 5°F)
    Good
    Winter efficiency
    9.4 (HSPF2)
    Good
    Cooling efficiency
    20.0 (SEER2)
    Great
    Hot-day cooling
    13.3 (EER2)
    Top 10%
    79.6score / 100Heating 67 · Cooling 92
  2. 2TZP15AY24AJ2Nwith ducted air handler L(E,F)W30BJTHERMAL ZONE2 tons · 21,800 Btu/h · DuctedCold-climate pick, score 75.5Meets Xcel CC
    Heat kept at 5°F
    102% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.88 (COP at 5°F)
    Top 10%
    Winter efficiency
    7.8 (HSPF2)
    Below the middle
    Cooling efficiency
    15.2 (SEER2)
    Below the middle
    Hot-day cooling
    11.7 (EER2)
    Below the middle
    56.7score / 100Heating 76 · Cooling 38
  3. 3TZP15AY30AJ2Nwith ducted air handler L(E,F)W30CJTHERMAL ZONE2 tons · 26,200 Btu/h · DuctedCold-climate pick, score 74.1Meets Xcel CC
    Heat kept at 5°F
    102% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.67 (COP at 5°F)
    Top 10%
    Winter efficiency
    7.8 (HSPF2)
    Below the middle
    Cooling efficiency
    15.2 (SEER2)
    Below the middle
    Hot-day cooling
    11.7 (EER2)
    Below the middle
    56.1score / 100Heating 74 · Cooling 38
  4. 4TZID24H520ZCSwith ducted air handler TZID24H520ZAMTHERMAL ZONE2 tons · 24,000 Btu/h · DuctedCold-climate pick, score 59.7Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    83% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    1.87 (COP at 5°F)
    Below the middle
    Winter efficiency
    9.7 (HSPF2)
    Great
    Cooling efficiency
    18.1 (SEER2)
    Good
    Hot-day cooling
    11.0 (EER2)
    Below the middle
    51.7score / 100Heating 60 · Cooling 44
  5. 5TZP14AY30AJ2Nwith ducted air handler AE*S+DM36E3J+TDRTHERMAL ZONE2 tons · 26,800 Btu/h · DuctedNot a cold-climate pick: keeps 59% of its heat at 5°FMeets none of the standards tracked here
    Heat kept at 5°F
    59% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.32 (COP at 5°F)
    Great
    Winter efficiency
    7.5 (HSPF2)
    Below the middle
    Cooling efficiency
    14.3 (SEER2)
    Below the middle
    Hot-day cooling
    9.0 (EER2)
    Below the middle
    26.5score / 100Heating 45 · Cooling 8

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

What to do next

The advanced view has THERMAL ZONE’s ranks on each rating, its models inside every size and type, cold-weather curves and its newest certifications.

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