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Endura vs THERMOFLUX: heat pump ratings compared

Against heat pumps of the same size and type, a typical Endura model beats 63% and a typical THERMOFLUX model 43%. Endura rates higher overall.

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

Endura

63%

of similar heat pumps beaten by its typical model

Well above average

9 models listed

THERMOFLUX

43%

of similar heat pumps beaten by its typical model

Below average

9 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°FEndura: Beats 47%THERMOFLUX: Beats 25%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FEndura: Beats 73%THERMOFLUX: Beats 66%
  • Winter-long heating efficiencyHSPF2Endura: Beats 57%THERMOFLUX: Beats 61%
  • Summer-long cooling efficiencySEER2Endura: Beats 69%THERMOFLUX: Beats 50%
  • Hot-day cooling efficiencyEER2Endura: Beats 66%THERMOFLUX: Beats 22%

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

    Endura
    100%
    THERMOFLUX
    44%

  • Xcel CC

    Endura
    100%
    THERMOFLUX
    44%

  • CEE Advanced

    Endura
    0%
    THERMOFLUX
    0%

  • ENERGY STAR CC

    Endura
    100%
    THERMOFLUX
    44%

All-around best, ducted 2.5–3 tons

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?

Endura

  1. 1HBEFU-36R454Bwith ducted air handler HBEC-FC36R454BEndura2.5 tons · 32,000 Btu/h · DuctedCold-climate pick, score 87.9Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    97% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    2.15 (COP at 5°F)
    Great
    Winter efficiency
    10.5 (HSPF2)
    Top 10%
    Cooling efficiency
    19.5 (SEER2)
    Top 10%
    Hot-day cooling
    11.7 (EER2)
    Good
    82.3score / 100Heating 88 · Cooling 77
  2. 2HBEFLM4-OD36Endura3 tons · 36,000 Btu/h · DuctedCold-climate pick, score 54.3Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    90% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    1.80 (COP at 5°F)
    Below the middle
    Winter efficiency
    9.0 (HSPF2)
    Good
    Cooling efficiency
    19.0 (SEER2)
    Great
    Hot-day cooling
    12.9 (EER2)
    Top 10%
    72.3score / 100Heating 54 · Cooling 90
  3. 3HBEFLM3-OD27Endura2.5 tons · 27,000 Btu/h · DuctedCold-climate pick, score 56.7Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    98% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    1.80 (COP at 5°F)
    Below the middle
    Winter efficiency
    8.8 (HSPF2)
    Good
    Cooling efficiency
    18.0 (SEER2)
    Good
    Hot-day cooling
    11.5 (EER2)
    Good
    58.2score / 100Heating 57 · Cooling 60

THERMOFLUX

  1. 1TMFS36HDI2NAJ0H26with ducted air handler TMFS36IDI2NAJ0H26THERMOFLUX3 tons · 36,000 Btu/h · DuctedCold-climate pick, score 64.5Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    100% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    1.85 (COP at 5°F)
    Below the middle
    Winter efficiency
    9.5 (HSPF2)
    Great
    Cooling efficiency
    18.0 (SEER2)
    Good
    Hot-day cooling
    11.0 (EER2)
    Below the middle
    57.9score / 100Heating 65 · Cooling 51
  2. 2THH36TDI2NAF2H26with ducted air handler THH36IDI2NAF2H26THERMOFLUX3 tons · 36,000 Btu/h · DuctedNot a cold-climate pick: keeps 63% of its heat at 5°FMeets none of the standards tracked here
    Heat kept at 5°F
    64% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    1.80 (COP at 5°F)
    Below the middle
    Winter efficiency
    8.1 (HSPF2)
    Below the middle
    Cooling efficiency
    15.2 (SEER2)
    Below the middle
    Hot-day cooling
    9.0 (EER2)
    Below the middle
    26.8score / 100Heating 35 · Cooling 19
  3. 3TMFT36TDI2NAF2H26with ducted air handler TMFT36IDI2NAF2H26THERMOFLUX3 tons · 36,000 Btu/h · DuctedNot a cold-climate pick: keeps 63% of its heat at 5°FMeets none of the standards tracked here
    Heat kept at 5°F
    64% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    1.80 (COP at 5°F)
    Below the middle
    Winter efficiency
    8.1 (HSPF2)
    Below the middle
    Cooling efficiency
    15.2 (SEER2)
    Below the middle
    Hot-day cooling
    9.0 (EER2)
    Below the middle
    26.8score / 100Heating 35 · Cooling 19

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.

Open the advanced view