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ADP vs STEALTH: heat pump ratings compared

Against heat pumps of the same size and type, a typical ADP model beats 52% and a typical STEALTH model 57%. STEALTH rates slightly higher overall.

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

ADP

52%

of similar heat pumps beaten by its typical model

About average

41 models listed

STEALTH

57%

of similar heat pumps beaten by its typical model

Above average

42 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°FADP: Beats 46%STEALTH: Beats 45%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FADP: Beats 73%STEALTH: Beats 61%
  • Winter-long heating efficiencyHSPF2ADP: Beats 64%STEALTH: Beats 69%
  • Summer-long cooling efficiencySEER2ADP: Beats 57%STEALTH: Beats 61%
  • Hot-day cooling efficiencyEER2ADP: Beats 30%STEALTH: Beats 45%

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

    ADP
    54%
    STEALTH
    62%

  • Xcel CC

    ADP
    73%
    STEALTH
    48%

  • CEE Advanced

    ADP
    2%
    STEALTH
    2%

  • ENERGY STAR CC

    ADP
    0%
    STEALTH
    50%

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?

ADP

No ductless, 2.5–3 tons model from ADP.

STEALTH

  1. 1ACIQ-36Z-HH-M4BSTEALTH3 tons · 36,000 Btu/h · DuctlessKeeps 97% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    97% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    1.90 (COP at 5°F)
    Good
    Seasonal efficiency
    10.3 (HSPF2)
    Great
    79.3score / 100
  2. 2ACIQ-36ZPL-HP230Bwith ductless indoor unit ACIQ-36CC-HH-MBSTEALTH3 tons · 36,000 Btu/h · DuctlessKeeps 103% of its heat at 5°FMeets Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    103% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    1.83 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    10.5 (HSPF2)
    Top 10%
    75.0score / 100
  3. 3ACIQ-27Z-HH-M3BSTEALTH2.5 tons · 28,000 Btu/h · DuctlessKeeps 89% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    89% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    1.80 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    10.6 (HSPF2)
    Top 10%
    61.4score / 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