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K&A vs ZEPHYR: heat pump ratings compared

Against heat pumps of the same size and type, a typical K&A model beats 30% and a typical ZEPHYR model 63%. ZEPHYR rates higher overall.

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

K&A

30%

of similar heat pumps beaten by its typical model

Well below average

23 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°FK&A: Beats 31%ZEPHYR: Beats 57%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FK&A: Beats 39%ZEPHYR: Beats 64%
  • Winter-long heating efficiencyHSPF2K&A: Beats 33%ZEPHYR: Beats 59%
  • Summer-long cooling efficiencySEER2K&A: Beats 27%ZEPHYR: Beats 67%
  • Hot-day cooling efficiencyEER2K&A: Beats 28%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

    K&A
    17%
    ZEPHYR
    100%

  • Xcel CC

    K&A
    17%
    ZEPHYR
    83%

  • CEE Advanced

    K&A
    0%
    ZEPHYR
    9%

  • ENERGY STAR CC

    K&A
    0%
    ZEPHYR
    74%

Top cold-climate picks, ducted 3.5–4.5 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 Ducted, 3.5–4.5 tons (39,000–56,999 Btu/h cooling). What size is my system?

K&A

  1. 1DIVINE-48K220V-7-Owith ducted air handler DIVINE-48K220V-7-IK&A4 tons · 47,000 Btu/h · DuctedKeeps 72% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    72% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.30 (COP at 5°F)
    Great
    Seasonal efficiency
    9.2 (HSPF2)
    Great
    72.2score / 100
  2. 2DIVINE-60K220V-7-Owith ducted air handler DIVINE-60K220V-7-IK&A4.5 tons · 55,000 Btu/h · DuctedKeeps 73% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC
    Heat kept at 5°F
    73% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.30 (COP at 5°F)
    Great
    Seasonal efficiency
    8.8 (HSPF2)
    Good
    69.8score / 100
  3. 3CELESTIAL-48K220V-7K&AAlso listed as CELESTIAL-48K220V-74 tons · 48,000 Btu/h · DuctedKeeps 72% of its heat at 5°FMeets none of the standards tracked here
    Heat kept at 5°F
    72% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    1.82 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    7.8 (HSPF2)
    Below the middle
    41.0score / 100

ZEPHYR

  1. 1ZE-648HPAwith ducted air handler AH-648AZEPHYR4 tons · 48,000 Btu/h · DuctedKeeps 77% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    77% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.52 (COP at 5°F)
    Top 10%
    Seasonal efficiency
    9.0 (HSPF2)
    Good
    77.3score / 100
  2. 2ZE-542M525ZEPHYR3.5 tons · 42,000 Btu/h · DuctedKeeps 76% of its heat at 5°FMeets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    76% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    1.80 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    8.8 (HSPF2)
    Good
    50.7score / 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