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Clima Smart vs MAMMOTH: heat pump ratings compared

Against heat pumps of the same size and type, a typical Clima Smart model beats 61% and a typical MAMMOTH model 39%. Clima Smart rates higher overall.

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

Clima Smart

61%

of similar heat pumps beaten by its typical model

Well above average

4 models listed

MAMMOTH

39%

of similar heat pumps beaten by its typical model

Well below average

4 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°FClima Smart: Beats 81%MAMMOTH: Beats 15%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FClima Smart: Beats 50%MAMMOTH: Beats 29%
  • Winter-long heating efficiencyHSPF2Clima Smart: Beats 47%MAMMOTH: Beats 41%
  • Summer-long cooling efficiencySEER2Clima Smart: Beats 62%MAMMOTH: Beats 55%
  • Hot-day cooling efficiencyEER2Clima Smart: Beats 64%MAMMOTH: Beats 43%

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

    Clima Smart
    100%
    MAMMOTH
    50%

  • Xcel CC

    Clima Smart
    75%
    MAMMOTH
    50%

  • CEE Advanced

    Clima Smart
    0%
    MAMMOTH
    0%

  • ENERGY STAR CC

    Clima Smart
    0%
    MAMMOTH
    50%

Top cold-climate picks, ducted 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 Ducted, 2.5–3 tons (27,000–38,999 Btu/h cooling). What size is my system?

Clima Smart

No ducted, 2.5–3 tons model from Clima Smart.

MAMMOTH

  1. 1GXH24-36MSK4DHwith ducted air handler GMH**-36MSK4DH1MAMMOTH3 tons · 34,000 Btu/h · DuctedKeeps 80% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    80% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    1.80 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    9.0 (HSPF2)
    Good
    55.3score / 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