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Custom Comfort vs SEA BREEZE+: heat pump ratings compared

Against heat pumps of the same size and type, a typical Custom Comfort model beats 65% and a typical SEA BREEZE+ model 66%. SEA BREEZE+ rates slightly higher overall.

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

Custom Comfort

65%

of similar heat pumps beaten by its typical model

Well above average

20 models listed

SEA BREEZE+

66%

of similar heat pumps beaten by its typical model

Well above average

19 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°FCustom Comfort: Beats 50%SEA BREEZE+: Beats 46%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FCustom Comfort: Beats 83%SEA BREEZE+: Beats 68%
  • Winter-long heating efficiencyHSPF2Custom Comfort: Beats 84%SEA BREEZE+: Beats 78%
  • Summer-long cooling efficiencySEER2Custom Comfort: Beats 65%SEA BREEZE+: Beats 73%
  • Hot-day cooling efficiencyEER2Custom Comfort: Beats 51%SEA BREEZE+: Beats 62%

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

    Custom Comfort
    75%
    SEA BREEZE+
    90%

  • Xcel CC

    Custom Comfort
    85%
    SEA BREEZE+
    84%

  • CEE Advanced

    Custom Comfort
    5%
    SEA BREEZE+
    5%

  • ENERGY STAR CC

    Custom Comfort
    100%
    SEA BREEZE+
    90%

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?

Custom Comfort

  1. 1CCOXHASZ06HPwith ductless indoor unit CCOXHAWM06Custom Comfort0.5 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. 2CCOXHASZ12HPwith ductless indoor unit CCOXHAFM12Custom Comfort1 ton · 12,000 Btu/h · DuctlessKeeps 99% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    99% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    1.99 (COP at 5°F)
    Good
    Seasonal efficiency
    10.7 (HSPF2)
    Great
    77.0score / 100
  3. 3CCOXHASZ09HPwith ductless indoor unit CCOXHAWM09Custom Comfort1 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

SEA BREEZE+

  1. 1SZ9H424ZMOwith ductless indoor unit WM9H424ZMISEA BREEZE+1 ton · 9,000 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
    2.22 (COP at 5°F)
    Great
    Seasonal efficiency
    11.6 (HSPF2)
    Top 10%
    86.0score / 100
  2. 2SZ12H424ZMOwith ductless indoor unit C12H424ZMISEA BREEZE+1 ton · 12,000 Btu/h · DuctlessKeeps 72% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    72% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.45 (COP at 5°F)
    Top 10%
    Seasonal efficiency
    11.0 (HSPF2)
    Great
    79.4score / 100
  3. 3HSZ12H424ZMOwith ductless indoor unit C12H424ZMISEA BREEZE+1 ton · 12,000 Btu/h · DuctlessKeeps 99% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    99% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    1.99 (COP at 5°F)
    Good
    Seasonal efficiency
    10.7 (HSPF2)
    Great
    77.0score / 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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