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Della vs THERMAL ZONE: heat pump ratings compared

Against heat pumps of the same size and type, a typical Della model beats 48% and a typical THERMAL ZONE model 30%. Della rates higher overall.

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

Della

48%

of similar heat pumps beaten by its typical model

About average

94 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°FDella: Beats 43%THERMAL ZONE: Beats 40%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FDella: Beats 44%THERMAL ZONE: Beats 26%
  • Winter-long heating efficiencyHSPF2Della: Beats 50%THERMAL ZONE: Beats 23%
  • Summer-long cooling efficiencySEER2Della: Beats 55%THERMAL ZONE: Beats 24%
  • Hot-day cooling efficiencyEER2Della: Beats 41%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

    Della
    68%
    THERMAL ZONE
    8%

  • Xcel CC

    Della
    66%
    THERMAL ZONE
    8%

  • CEE Advanced

    Della
    0%
    THERMAL ZONE
    0%

  • ENERGY STAR CC

    Della
    44%
    THERMAL ZONE
    8%

All-around best, ductless 3.5–4.5 tons

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

Showing Ductless, 3.5–4.5 tons (39,000–56,999 Btu/h cooling). What size is my system?

Della

  1. 1048-TPH-MODU-1D6Della4 tons · 48,000 Btu/h · DuctlessCold-climate pick, score 48.1Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    88% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Below the middle
    Winter efficiency
    10.0 (HSPF2)
    Below the middle
    Cooling efficiency
    24.0 (SEER2)
    Top 10%
    Hot-day cooling
    12.3 (EER2)
    Great
    70.2score / 100Heating 48 · Cooling 92
  2. 2048-TCQ-MODU-1D5Della3.5 tons · 42,000 Btu/h · DuctlessCold-climate pick, score 32.7Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    74% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Below the middle
    Winter efficiency
    10.0 (HSPF2)
    Below the middle
    Cooling efficiency
    24.0 (SEER2)
    Top 10%
    Hot-day cooling
    11.2 (EER2)
    Below the middle
    49.3score / 100Heating 33 · Cooling 66
  3. 3048-TLP-MODU-1D5Della3.5 tons · 42,000 Btu/h · DuctlessCold-climate pick, score 32.0Meets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    71% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Below the middle
    Winter efficiency
    10.0 (HSPF2)
    Below the middle
    Cooling efficiency
    22.0 (SEER2)
    Good
    Hot-day cooling
    11.2 (EER2)
    Below the middle
    42.9score / 100Heating 32 · Cooling 54

THERMAL ZONE

No ductless, 3.5–4.5 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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