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ZERO heat pumps: how do their ratings compare?

A typical ZERO heat pump beats 53% of similar heat pumps (same size and type), which is about average. ZERO has 119 heat pump models in this list.

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

Overall score

53%

of similar heat pumps beaten by its typical model

About average

ZERO has no QMID (the manufacturer ID the 25C tax credit needs) on file, so it is not ranked against other brands. Based on 130 models with every rating.

ZERO, rating by ratingStrongest on summer-long cooling efficiency (beats 58%), weakest on efficiency on a 5°f day (beats 45%).
  • Efficiency on a 5°F dayCOP at 5°FBeats 45%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FBeats 52%
  • Winter-long heating efficiencyHSPF2Beats 57%
  • Summer-long cooling efficiencySEER2Beats 58%
  • Hot-day cooling efficiencyEER2Beats 48%

Average (50%)

Each bar: the share of similar heat pumps a typical model beats on that rating.

Want ZERO’s ranks and its models inside every size class? Switch to Advanced

Rebate standards

Share of this brand’s models that meet the efficiency levels rebate programs use. Programs can have other rules too.

  • 71%

    meet CEE 2025 Tier 1, the level many utility rebates use.

    84 models. All brands: 57%.

    See them

  • 65%

    meet Xcel Energy Colorado’s cold-climate rebate levels.

    77 models. All brands: 53%.

    See them

  • 0%

    reach the cold-climate tier: full heating output and a COP of 2.1 or more at 5°F.

    None of its models yet. All brands: 3%.

Top ZERO cold-climate picks, by size

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?

13 of ZERO’s 20 models of this size and type qualify.

  1. 1Z4SOV-36HDMB-USHHZERO3 tons · 36,000 Btu/h · DuctedKeeps 106% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    106% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    10.4 (HSPF2)
    Top 10%
    82.5score / 100
  2. 2ZSOVA-36HDMB-USHHwith ducted air handler ZAVA-36HDMB-USZERO3 tons · 36,000 Btu/h · DuctedKeeps 105% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    105% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    1.90 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    10.3 (HSPF2)
    Top 10%
    73.1score / 100
  3. 3Z4SOV-27HDMB-USHHZERO2.5 tons · 28,000 Btu/h · DuctedKeeps 96% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    96% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    9.5 (HSPF2)
    Great
    72.7score / 100
  4. 4ZSOVA-30HDMB-USHHwith ducted air handler ZAVA-30HDMB-USZERO2.5 tons · 30,000 Btu/h · DuctedKeeps 96% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    96% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    1.96 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    10.0 (HSPF2)
    Great
    68.7score / 100
  5. 5ZOV-36HDGBwith ducted air handler ZAV-36HDGBZERO3 tons · 34,000 Btu/h · DuctedKeeps 70% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    70% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.10 (COP at 5°F)
    Great
    Seasonal efficiency
    9.0 (HSPF2)
    Good
    64.9score / 100

These are certified test ratings, not a recommendation for your home. The right size comes from a load calculation by a contractor.

What to do next

The advanced view has ZERO’s ranks on each rating, its models inside every size and type, cold-weather curves and its newest certifications.

Open the advanced view