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NOVAIR vs ZEPHYR: heat pump ratings compared

Against heat pumps of the same size and type, a typical NOVAIR model beats 76% and a typical ZEPHYR model 63%. NOVAIR rates higher overall.

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

NOVAIR

76%

of similar heat pumps beaten by its typical model

Well above average

42 models listed

ZEPHYR

63%

of similar heat pumps beaten by its typical model

Well above average

23 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°FNOVAIR: Beats 59%ZEPHYR: Beats 57%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FNOVAIR: Beats 75%ZEPHYR: Beats 64%
  • Winter-long heating efficiencyHSPF2NOVAIR: Beats 80%ZEPHYR: Beats 59%
  • Summer-long cooling efficiencySEER2NOVAIR: Beats 83%ZEPHYR: Beats 67%
  • Hot-day cooling efficiencyEER2NOVAIR: Beats 81%ZEPHYR: Beats 65%

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

    NOVAIR
    98%
    ZEPHYR
    100%

  • Xcel CC

    NOVAIR
    100%
    ZEPHYR
    83%

  • CEE Advanced

    NOVAIR
    5%
    ZEPHYR
    9%

  • ENERGY STAR CC

    NOVAIR
    100%
    ZEPHYR
    74%

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?

NOVAIR

  1. 1LEA06SZ36-Owith ductless indoor unit 4LEA06USK-INOVAIR0.5 tons · 6,000 Btu/h · DuctlessKeeps 110% of its heat at 5°FMeets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP, ENERGY STAR CC
    Heat kept at 5°F
    110% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.40 (COP at 5°F)
    Top 10%
    Seasonal efficiency
    14.8 (HSPF2)
    Top 10%
    96.7score / 100
  2. 2LEA09SZ26-Owith ductless indoor unit LEA09CONSK-INOVAIR1 ton · 9,000 Btu/h · DuctlessKeeps 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
    2.27 (COP at 5°F)
    Top 10%
    Seasonal efficiency
    13.9 (HSPF2)
    Top 10%
    89.5score / 100
  3. 3LEA06HH-SK-Owith ductless indoor unit LEA06HH-SK-INOVAIR0.5 tons · 6,000 Btu/h · DuctlessKeeps 150% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    150% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    15.6 (HSPF2)
    Top 10%
    87.6score / 100

ZEPHYR

  1. 1ZE-09UB32Owith ductless indoor unit ZE-09UB32IZEPHYR1 ton · 9,000 Btu/h · DuctlessKeeps 100% of its heat at 5°FMeets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP, ENERGY STAR CC
    Heat kept at 5°F
    100% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    2.25 (COP at 5°F)
    Great
    Seasonal efficiency
    11.8 (HSPF2)
    Top 10%
    89.7score / 100
  2. 2ZE-12UB32Owith ductless indoor unit ZE-12UB32IZEPHYR1 ton · 12,000 Btu/h · DuctlessKeeps 100% of its heat at 5°FMeets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP, ENERGY STAR CC
    Heat kept at 5°F
    100% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    2.25 (COP at 5°F)
    Great
    Seasonal efficiency
    11.8 (HSPF2)
    Top 10%
    89.7score / 100
  3. 3ZE-09CB25Owith ductless indoor unit ZE-09CB25IZEPHYR1 ton · 9,000 Btu/h · DuctlessKeeps 100% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    100% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    2.09 (COP at 5°F)
    Good
    Seasonal efficiency
    11.0 (HSPF2)
    Great
    82.4score / 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.

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