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MULTIZONE vs SEA BREEZE: heat pump ratings compared

Against heat pumps of the same size and type, a typical MULTIZONE model beats 47% and a typical SEA BREEZE model 40%. MULTIZONE rates higher overall.

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

MULTIZONE

47%

of similar heat pumps beaten by its typical model

About average

9 models listed

SEA BREEZE

40%

of similar heat pumps beaten by its typical model

Below average

9 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°FMULTIZONE: Beats 14%SEA BREEZE: Beats 54%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FMULTIZONE: Beats 33%SEA BREEZE: Beats 25%
  • Winter-long heating efficiencyHSPF2MULTIZONE: Beats 23%SEA BREEZE: Beats 32%
  • Summer-long cooling efficiencySEER2MULTIZONE: Beats 31%SEA BREEZE: Beats 40%
  • Hot-day cooling efficiencyEER2MULTIZONE: Beats 47%SEA BREEZE: Beats 37%

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

    MULTIZONE
    22%
    SEA BREEZE
    56%

  • Xcel CC

    MULTIZONE
    11%
    SEA BREEZE
    22%

  • CEE Advanced

    MULTIZONE
    0%
    SEA BREEZE
    0%

  • ENERGY STAR CC

    MULTIZONE
    0%
    SEA BREEZE
    22%

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?

MULTIZONE

  1. 1MIT12H2G31(O)with ductless indoor unit MIT12H2G31(I)MULTIZONE1 ton · 12,000 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
    1.75 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    9.5 (HSPF2)
    Good
    34.7score / 100

SEA BREEZE

  1. 19H421YOMIwith ductless indoor unit 9H421YIMISEA BREEZE1 ton · 9,000 Btu/h · DuctlessKeeps 70% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    70% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.16 (COP at 5°F)
    Great
    Seasonal efficiency
    9.1 (HSPF2)
    Below the middle
    56.7score / 100
  2. 29H421ZOMIwith ductless indoor unit 9H421ZIMISEA BREEZE1 ton · 9,000 Btu/h · DuctlessKeeps 70% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    70% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    1.99 (COP at 5°F)
    Good
    Seasonal efficiency
    9.4 (HSPF2)
    Good
    51.8score / 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.

Open the advanced view