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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 3.5–4.5 tons

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

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

Endura

  1. 1HBEFU-48R454Bwith ducted air handler HBEC-FC48R454BEndura4 tons · 48,000 Btu/h · DuctedCold-climate pick, score 77.3Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    77% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.52 (COP at 5°F)
    Top 10%
    Winter efficiency
    9.0 (HSPF2)
    Good
    Cooling efficiency
    19.0 (SEER2)
    Great
    Hot-day cooling
    12.0 (EER2)
    Great
    82.3score / 100Heating 77 · Cooling 87
  2. 2HBEFLM5-OD42Endura3.5 tons · 42,000 Btu/h · DuctedCold-climate pick, score 50.7Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    76% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    1.80 (COP at 5°F)
    Below the middle
    Winter efficiency
    8.8 (HSPF2)
    Good
    Cooling efficiency
    18.0 (SEER2)
    Great
    Hot-day cooling
    11.4 (EER2)
    Good
    59.2score / 100Heating 51 · Cooling 68

THERMOFLUX

  1. 1TMFS48HDI2NAJ0H26with ducted air handler TMFS48IDI2NAJ0H26THERMOFLUX4 tons · 48,000 Btu/h · DuctedCold-climate pick, score 69.4Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    100% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    1.85 (COP at 5°F)
    Below the middle
    Winter efficiency
    9.5 (HSPF2)
    Great
    Cooling efficiency
    18.0 (SEER2)
    Great
    Hot-day cooling
    11.0 (EER2)
    Below the middle
    65.0score / 100Heating 69 · Cooling 61
  2. 2TMFS55HDI2NAJ0H26with ducted air handler TMFS55IDI2NAJ0H26THERMOFLUX4.5 tons · 54,000 Btu/h · DuctedCold-climate pick, score 66.4Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    93% (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
    17.0 (SEER2)
    Good
    Hot-day cooling
    10.0 (EER2)
    Below the middle
    54.9score / 100Heating 66 · Cooling 44
  3. 3TMFT48TDI2NAF2H26with ducted air handler TMFT48IDI2NAF2H26THERMOFLUX4 tons · 48,000 Btu/h · DuctedCold-climate pick, score 44.1Meets none of the standards tracked here
    Heat kept at 5°F
    75% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    1.80 (COP at 5°F)
    Below the middle
    Winter efficiency
    8.1 (HSPF2)
    Good
    Cooling efficiency
    15.2 (SEER2)
    Below the middle
    Hot-day cooling
    9.0 (EER2)
    Below the middle
    34.5score / 100Heating 44 · Cooling 25

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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