Skip to content
Rebate.Blue

RUSSELL vs ZERO: heat pump ratings compared

Against heat pumps of the same size and type, a typical RUSSELL model beats 49% and a typical ZERO model 49%. They are level.

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

RUSSELL

49%

of similar heat pumps beaten by its typical model

About average

60 models listed

ZERO

49%

of similar heat pumps beaten by its typical model

About average

69 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°FRUSSELL: Beats 80%ZERO: Beats 48%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FRUSSELL: Beats 43%ZERO: Beats 43%
  • Winter-long heating efficiencyHSPF2RUSSELL: Beats 25%ZERO: Beats 46%
  • Summer-long cooling efficiencySEER2RUSSELL: Beats 32%ZERO: Beats 53%
  • Hot-day cooling efficiencyEER2RUSSELL: Beats 42%ZERO: Beats 46%

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

    RUSSELL
    17%
    ZERO
    59%

  • Xcel CC

    RUSSELL
    13%
    ZERO
    48%

  • CEE Advanced

    RUSSELL
    3%
    ZERO
    0%

  • ENERGY STAR CC

    RUSSELL
    22%
    ZERO
    25%

All-around best, ducted 2.5–3 tons

Balances heating (5°F output and efficiency, HSPF2) and cooling (SEER2, EER2), each rating against units their size.

Showing Ducted, 2.5–3 tons (27,000–38,999 Btu/h cooling), the most-listed ducted size. Pick yours above. What size is my system?

RUSSELL

  1. 1SP18AZ36AJVCwith indoor coil TCFZ6021SEAAM and furnace S802VA100521ZRUSSELL3 tons · 34,200 Btu/h · DuctedCold-climate pick, score 80.6Meets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP, ENERGY STAR CC
    Heat kept at 5°F
    119% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.20 (COP at 5°F)
    Great
    Winter efficiency
    8.5 (HSPF2)
    Good
    Cooling efficiency
    20.0 (SEER2)
    Top 10%
    Hot-day cooling
    12.5 (EER2)
    Top 10%
    87.2score / 100Heating 81 · Cooling 94
  2. 2RD17AZ36AJ3Nwith ducted air handler SH2VZ3621MTANARUSSELL3 tons · 34,200 Btu/h · DuctedCold-climate pick, score 64.8Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    53% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.30 (COP at 5°F)
    Great
    Winter efficiency
    8.5 (HSPF2)
    Good
    Cooling efficiency
    19.0 (SEER2)
    Great
    Hot-day cooling
    12.0 (EER2)
    Great
    70.9score / 100Heating 56 · Cooling 86
  3. 3SP15AZ30AJ2Nwith ducted air handler SH2VZ3617STANNRUSSELL2.5 tons · 28,400 Btu/h · DuctedNot a cold-climate pick: keeps 54% of its heat at 5°FMeets CEE 2025, CEE 2026, ENERGY STAR CC
    Heat kept at 5°F
    55% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.20 (COP at 5°F)
    Great
    Winter efficiency
    8.1 (HSPF2)
    Below the middle
    Cooling efficiency
    16.0 (SEER2)
    Good
    Hot-day cooling
    11.7 (EER2)
    Good
    58.0score / 100Heating 51 · Cooling 65

ZERO

  1. 1Z3SOV-27HDM-USZERO2.5 tons · 28,000 Btu/h · DuctedCold-climate pick, score 57.4Meets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    71% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    1.83 (COP at 5°F)
    Below the middle
    Winter efficiency
    9.2 (HSPF2)
    Good
    Cooling efficiency
    21.0 (SEER2)
    Top 10%
    Hot-day cooling
    11.7 (EER2)
    Good
    71.5score / 100Heating 57 · Cooling 86
  2. 2Z4SOV-36HDM-USZERO3 tons · 36,000 Btu/h · DuctedNot a cold-climate pick: keeps 64% of its heat at 5°FMeets none of the standards tracked here
    Heat kept at 5°F
    65% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    1.68 (COP at 5°F)
    Below the middle
    Winter efficiency
    9.2 (HSPF2)
    Good
    Cooling efficiency
    20.0 (SEER2)
    Top 10%
    Hot-day cooling
    11.0 (EER2)
    Below the middle
    56.6score / 100Heating 44 · Cooling 69
  3. 3ZSOV-36HDM-USwith ducted air handler ZAV-36HDM-USZERO3 tons · 36,000 Btu/h · DuctedNot a cold-climate pick: keeps 63% of its heat at 5°FMeets none of the standards tracked here
    Heat kept at 5°F
    63% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.06 (COP at 5°F)
    Great
    Winter efficiency
    9.0 (HSPF2)
    Good
    Cooling efficiency
    15.4 (SEER2)
    Below the middle
    Hot-day cooling
    8.2 (EER2)
    Below the middle
    42.3score / 100Heating 62 · Cooling 22

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