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J-KU vs TEMPBLUE: heat pump ratings compared

Against heat pumps of the same size and type, a typical J-KU model beats 62% and a typical TEMPBLUE model 37%. J-KU rates higher overall.

Covers older R-410A heat pumps, no longer installed new. See models sold today · Updated

J-KU

62%

of similar heat pumps beaten by its typical model

Well above average

10 models listed

TEMPBLUE

37%

of similar heat pumps beaten by its typical model

Well below average

10 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°FJ-KU: Beats 49%TEMPBLUE: Beats 50%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FJ-KU: Beats 66%TEMPBLUE: Beats 23%
  • Winter-long heating efficiencyHSPF2J-KU: Beats 48%TEMPBLUE: Beats 31%
  • Summer-long cooling efficiencySEER2J-KU: Beats 67%TEMPBLUE: Beats 35%
  • Hot-day cooling efficiencyEER2J-KU: Beats 71%TEMPBLUE: Beats 34%

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

    J-KU
    100%
    TEMPBLUE
    50%

  • Xcel CC

    J-KU
    90%
    TEMPBLUE
    0%

  • CEE Advanced

    J-KU
    0%
    TEMPBLUE
    0%

  • ENERGY STAR CC

    J-KU
    80%
    TEMPBLUE
    0%

Top cold-climate picks, ductless 3.5–4.5 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, 3.5–4.5 tons (39,000–56,999 Btu/h cooling). What size is my system?

J-KU

  1. 1JKS-42H2HP-M5OJ-KU3.5 tons · 42,000 Btu/h · DuctlessKeeps 86% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    86% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    1.84 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    9.0 (HSPF2)
    Below the middle
    41.8score / 100

TEMPBLUE

No ductless, 3.5–4.5 tons model from TEMPBLUE.

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