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airspool vs STEALTH: heat pump ratings compared

Against heat pumps of the same size and type, a typical airspool model beats 66% and a typical STEALTH model 54%. airspool rates higher overall.

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

airspool

66%

of similar heat pumps beaten by its typical model

Well above average

11 models listed

STEALTH

54%

of similar heat pumps beaten by its typical model

About 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°Fairspool: Beats 76%STEALTH: Beats 53%
  • Heating power kept at 5°FCapacity at 5°F vs 47°Fairspool: Beats 75%STEALTH: Beats 59%
  • Winter-long heating efficiencyHSPF2airspool: Beats 72%STEALTH: Beats 59%
  • Summer-long cooling efficiencySEER2airspool: Beats 58%STEALTH: Beats 62%
  • Hot-day cooling efficiencyEER2airspool: Beats 65%STEALTH: Beats 39%

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

    airspool
    73%
    STEALTH
    73%

  • Xcel CC

    airspool
    73%
    STEALTH
    64%

  • CEE Advanced

    airspool
    0%
    STEALTH
    0%

  • ENERGY STAR CC

    airspool
    73%
    STEALTH
    0%

Top cold-climate picks, ductless up to 1.5 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, Up to 1.5 tons (under 21,000 Btu/h cooling). What size is my system?

airspool

  1. 1DWLA4-ACDC1-12KR2(US)with ductless indoor unit DGLA4-ACDC1-12KR2(US)airspoolAlso listed as DWLA4-12KR2(US)1 ton · 11,000 Btu/h · DuctlessKeeps 109% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    109% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.05 (COP at 5°F)
    Good
    Seasonal efficiency
    10.8 (HSPF2)
    Great
    82.4score / 100
  2. 2DWA5-ACDC-18KR2(US)with ductless indoor unit DGA5-ACDC-18KR2(US)airspool1.5 tons · 17,000 Btu/h · DuctlessKeeps 74% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    74% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.15 (COP at 5°F)
    Great
    Seasonal efficiency
    9.8 (HSPF2)
    Good
    60.0score / 100

STEALTH

  1. 1AC-18Z-E-M2STEALTH1.5 tons · 17,700 Btu/h · DuctlessKeeps 81% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    81% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    10.0 (HSPF2)
    Good
    64.5score / 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