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PRIME vs TEMP SHIFT: heat pump ratings compared

Against heat pumps of the same size and type, a typical PRIME model beats 20% and a typical TEMP SHIFT model 66%. TEMP SHIFT rates higher overall.

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

PRIME

20%

of similar heat pumps beaten by its typical model

Well below average

18 models listed

TEMP SHIFT

66%

of similar heat pumps beaten by its typical model

Well above average

19 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°FPRIME: Beats 44%TEMP SHIFT: Beats 52%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FPRIME: Beats 15%TEMP SHIFT: Beats 79%
  • Winter-long heating efficiencyHSPF2PRIME: Beats 21%TEMP SHIFT: Beats 79%
  • Summer-long cooling efficiencySEER2PRIME: Beats 18%TEMP SHIFT: Beats 61%
  • Hot-day cooling efficiencyEER2PRIME: Beats 32%TEMP SHIFT: Beats 62%

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

    PRIME
    11%
    TEMP SHIFT
    95%

  • Xcel CC

    PRIME
    11%
    TEMP SHIFT
    90%

  • CEE Advanced

    PRIME
    0%
    TEMP SHIFT
    5%

  • ENERGY STAR CC

    PRIME
    0%
    TEMP SHIFT
    0%

Top cold-climate picks, ductless 2.5–3 tons

Only units that keep at least 70% of their heat at 5°F, ranked on heat kept, efficiency at 5°F and seasonal efficiency (HSPF2), against units their size.

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

PRIME

None of PRIME’s ductless, 2.5–3 tons models qualifies.

TEMP SHIFT

  1. 1TSMZHH365Z2R5TEMP SHIFT3 tons · 36,000 Btu/h · DuctlessKeeps 104% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    104% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    1.95 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    10.9 (HSPF2)
    Top 10%
    72.6score / 100
  2. 2TSMZHH274Z2R5TEMP SHIFT2.5 tons · 27,000 Btu/h · DuctlessKeeps 100% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    100% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    1.90 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    10.0 (HSPF2)
    Good
    53.7score / 100

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