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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, 2.5–3 tons (27,000–38,999 Btu/h cooling). What size is my system?

16 of THERMAL ZONE’s 29 models of this size and type have all five ratings.

  1. 1TZP15AY36AJ2Nwith ducted air handler AEW37J+TDRTHERMAL ZONE2.5 tons · 31,600 Btu/h · DuctedCold-climate pick, score 72.6Meets none of the standards tracked here
    Heat kept at 5°F
    102% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.66 (COP at 5°F)
    Top 10%
    Winter efficiency
    7.5 (HSPF2)
    Below the middle
    Cooling efficiency
    14.5 (SEER2)
    Below the middle
    Hot-day cooling
    11.7 (EER2)
    Good
    58.7score / 100Heating 73 · Cooling 45
  2. 2TZID30H520ZCSwith ducted air handler TZID30H520ZAMTHERMAL ZONE2.5 tons · 30,000 Btu/h · DuctedNot a cold-climate pick: keeps 61% of its heat at 5°FMeets CEE 2025
    Heat kept at 5°F
    62% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Winter efficiency
    8.5 (HSPF2)
    Good
    Cooling efficiency
    17.0 (SEER2)
    Good
    Hot-day cooling
    10.7 (EER2)
    Below the middle
    45.1score / 100Heating 49 · Cooling 41
  3. 3TZID36H520ZCSwith ducted air handler TZID36H520ZAMTHERMAL ZONE3 tons · 36,000 Btu/h · DuctedCold-climate pick, score 59.8Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    75% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Winter efficiency
    8.7 (HSPF2)
    Good
    Cooling efficiency
    16.1 (SEER2)
    Below the middle
    Hot-day cooling
    10.0 (EER2)
    Below the middle
    44.5score / 100Heating 60 · Cooling 29
  4. 4TZP14AY36AJ2Nwith ducted air handler AE*S+DM36E3J+TDRTHERMAL ZONE2.5 tons · 32,400 Btu/h · DuctedNot a cold-climate pick: keeps 65% of its heat at 5°FMeets none of the standards tracked here
    Heat kept at 5°F
    65% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.55 (COP at 5°F)
    Top 10%
    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
    34.0score / 100Heating 55 · Cooling 13
  5. 5TZSP14AY30AJ2Nwith ducted air handler TZHDYTST3617*NANTHERMAL ZONE2.5 tons · 28,400 Btu/h · DuctedNot a cold-climate pick: keeps 51% of its heat at 5°FMeets none of the standards tracked here
    Heat kept at 5°F
    51% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.20 (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
    29.0score / 100Heating 45 · Cooling 13

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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