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AIR C vs OLMO: heat pump ratings compared

Against heat pumps of the same size and type, a typical AIR C model beats 78% and a typical OLMO model 43%. AIR C rates higher overall.

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

AIR C

78%

of similar heat pumps beaten by its typical model

Well above average

11 models listed

OLMO

43%

of similar heat pumps beaten by its typical model

Below average

11 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°FAIR C: Beats 60%OLMO: Beats 45%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FAIR C: Beats 85%OLMO: Beats 40%
  • Winter-long heating efficiencyHSPF2AIR C: Beats 88%OLMO: Beats 33%
  • Summer-long cooling efficiencySEER2AIR C: Beats 81%OLMO: Beats 45%
  • Hot-day cooling efficiencyEER2AIR C: Beats 79%OLMO: Beats 50%

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

    AIR C
    91%
    OLMO
    91%

  • Xcel CC

    AIR C
    100%
    OLMO
    55%

  • CEE Advanced

    AIR C
    0%
    OLMO
    0%

  • ENERGY STAR CC

    AIR C
    0%
    OLMO
    36%

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?

AIR C

  1. 1UE-H48M1PAIR C4 tons · 47,000 Btu/h · DuctlessKeeps 98% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    98% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    11.0 (HSPF2)
    Top 10%
    73.5score / 100
  2. 2UE-H55M1PAIR C4.5 tons · 52,000 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
    2.05 (COP at 5°F)
    Good
    Seasonal efficiency
    10.6 (HSPF2)
    Good
    66.0score / 100

OLMO

  1. 1OS-RMS42-230VOOLMO3.5 tons · 42,000 Btu/h · DuctlessKeeps 75% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    75% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    1.90 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    9.5 (HSPF2)
    Below the middle
    16.4score / 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