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Century vs KLIMAIRE: heat pump ratings compared

Against heat pumps of the same size and type, a typical Century model beats 54% and a typical KLIMAIRE model 52%. Century rates slightly higher overall.

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

Century

54%

of similar heat pumps beaten by its typical model

About average

63 models listed

KLIMAIRE

52%

of similar heat pumps beaten by its typical model

About average

63 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°FCentury: Beats 57%KLIMAIRE: Beats 46%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FCentury: Beats 52%KLIMAIRE: Beats 44%
  • Winter-long heating efficiencyHSPF2Century: Beats 44%KLIMAIRE: Beats 53%
  • Summer-long cooling efficiencySEER2Century: Beats 40%KLIMAIRE: Beats 54%
  • Hot-day cooling efficiencyEER2Century: Beats 53%KLIMAIRE: Beats 40%

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

    Century
    44%
    KLIMAIRE
    52%

  • Xcel CC

    Century
    27%
    KLIMAIRE
    33%

  • CEE Advanced

    Century
    0%
    KLIMAIRE
    2%

  • ENERGY STAR CC

    Century
    30%
    KLIMAIRE
    0%

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?

Century

  1. 1A-VMH06SV-1with ductless indoor unit B-VMH06SV-1Century0.5 tons · 6,000 Btu/h · DuctlessKeeps 107% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    107% (Capacity at 5°F vs 47°F)
    Top 10%
    Efficiency at 5°F
    2.09 (COP at 5°F)
    Great
    Seasonal efficiency
    13.6 (HSPF2)
    Top 10%
    89.3score / 100
  2. 2A-VMH09SV-1with ductless indoor unit B-VMH09SV-1Century1 ton · 9,000 Btu/h · DuctlessKeeps 88% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    88% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    1.97 (COP at 5°F)
    Good
    Seasonal efficiency
    11.5 (HSPF2)
    Top 10%
    76.2score / 100
  3. 3A-VMH18SV-1with ductless indoor unit B-VMH18SV-1Century1.5 tons · 18,000 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
    1.80 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    11.3 (HSPF2)
    Top 10%
    67.2score / 100

KLIMAIRE

  1. 1KSIE009-H221-O-2with ductless indoor unit KSIE009-H221-IW-2KLIMAIRE1 ton · 9,000 Btu/h · DuctlessKeeps 80% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    80% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.11 (COP at 5°F)
    Great
    Seasonal efficiency
    11.4 (HSPF2)
    Top 10%
    80.2score / 100
  2. 2KSIH009-H225-O-2with ductless indoor unit KSIH009-H225-IW-2KLIMAIRE1 ton · 9,000 Btu/h · DuctlessKeeps 94% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    94% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    1.90 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    11.6 (HSPF2)
    Top 10%
    74.8score / 100
  3. 3KSIE018-H220-O-2with ductless indoor unit KSIE018-H220-IW-2KLIMAIRE1.5 tons · 18,000 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
    2.38 (COP at 5°F)
    Top 10%
    Seasonal efficiency
    10.3 (HSPF2)
    Great
    70.6score / 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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