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MANUFLOW vs ZEPHYR: heat pump ratings compared

Against heat pumps of the same size and type, a typical MANUFLOW model beats 56% and a typical ZEPHYR model 58%. ZEPHYR rates slightly higher overall.

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

MANUFLOW

56%

of similar heat pumps beaten by its typical model

Above average

34 models listed

ZEPHYR

58%

of similar heat pumps beaten by its typical model

Above average

25 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°FMANUFLOW: Beats 34%ZEPHYR: Beats 40%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FMANUFLOW: Beats 48%ZEPHYR: Beats 68%
  • Winter-long heating efficiencyHSPF2MANUFLOW: Beats 28%ZEPHYR: Beats 43%
  • Summer-long cooling efficiencySEER2MANUFLOW: Beats 39%ZEPHYR: Beats 53%
  • Hot-day cooling efficiencyEER2MANUFLOW: Beats 50%ZEPHYR: Beats 52%

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

    MANUFLOW
    35%
    ZEPHYR
    76%

  • Xcel CC

    MANUFLOW
    29%
    ZEPHYR
    76%

  • CEE Advanced

    MANUFLOW
    0%
    ZEPHYR
    0%

  • ENERGY STAR CC

    MANUFLOW
    0%
    ZEPHYR
    36%

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?

MANUFLOW

No ducted, 3.5–4.5 tons model from MANUFLOW.

ZEPHYR

  1. 1ZE-48HPBwith ducted air handler AH-48BZEPHYR4 tons · 48,000 Btu/h · DuctedKeeps 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)
    Good
    Efficiency at 5°F
    1.90 (COP at 5°F)
    Below the middle
    Seasonal efficiency
    8.5 (HSPF2)
    Good
    56.6score / 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.

Open the advanced view