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NOVAIR vs Viessmann: heat pump ratings compared

Against heat pumps of the same size and type, a typical NOVAIR model beats 63% and a typical Viessmann model 53%. NOVAIR rates higher overall.

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

NOVAIR

63%

of similar heat pumps beaten by its typical model

Well above average

25 models listed

Viessmann

53%

of similar heat pumps beaten by its typical model

About average

53 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 48%Viessmann: Beats 52%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FNOVAIR: Beats 64%Viessmann: Beats 50%
  • Winter-long heating efficiencyHSPF2NOVAIR: Beats 73%Viessmann: Beats 63%
  • Summer-long cooling efficiencySEER2NOVAIR: Beats 69%Viessmann: Beats 58%
  • Hot-day cooling efficiencyEER2NOVAIR: Beats 60%Viessmann: 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

    NOVAIR
    88%
    Viessmann
    64%

  • Xcel CC

    NOVAIR
    80%
    Viessmann
    43%

  • CEE Advanced

    NOVAIR
    0%
    Viessmann
    4%

  • ENERGY STAR CC

    NOVAIR
    80%
    Viessmann
    47%

Top cold-climate picks, ductless 2 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 tons (21,000–26,999 Btu/h cooling). What size is my system?

NOVAIR

  1. 1LEA24SZ35SK-Owith ductless indoor unit 2LEA24UUSK-INOVAIR2 tons · 24,000 Btu/h · DuctlessKeeps 86% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    86% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.21 (COP at 5°F)
    Top 10%
    Seasonal efficiency
    11.4 (HSPF2)
    Top 10%
    84.5score / 100
  2. 2LEA24SZ25SK-Owith ductless indoor unit 2LEA24UUSK-INOVAIR2 tons · 24,000 Btu/h · DuctlessKeeps 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
    2.04 (COP at 5°F)
    Good
    Seasonal efficiency
    10.0 (HSPF2)
    Good
    60.4score / 100

Viessmann

  1. 1DLCSRBH24AAKwith ductless indoor unit DLFSCBH24XAKViessmann2 tons · 24,000 Btu/h · DuctlessKeeps 103% of its heat at 5°FMeets CEE 2025, CEE 2026, CEE Advanced, Xcel CC, DOE CCHP, ENERGY STAR CC
    Heat kept at 5°F
    103% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Seasonal efficiency
    11.5 (HSPF2)
    Top 10%
    86.1score / 100
  2. 2DLCMHBH24CAKViessmann2 tons · 24,000 Btu/h · DuctlessKeeps 73% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    73% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    1.87 (COP at 5°F)
    Good
    Seasonal efficiency
    9.7 (HSPF2)
    Good
    53.3score / 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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