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MANASTIN vs SLOMIN'S: heat pump ratings compared

Against heat pumps of the same size and type, a typical MANASTIN model beats 24% and a typical SLOMIN'S model 36%. SLOMIN'S rates higher overall.

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

MANASTIN

24%

of similar heat pumps beaten by its typical model

Well below average

10 models listed

SLOMIN'S

36%

of similar heat pumps beaten by its typical model

Well below average

10 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°FMANASTIN: Beats 17%SLOMIN'S: Beats 39%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FMANASTIN: Beats 34%SLOMIN'S: Beats 43%
  • Winter-long heating efficiencyHSPF2MANASTIN: Beats 12%SLOMIN'S: Beats 37%
  • Summer-long cooling efficiencySEER2MANASTIN: Beats 28%SLOMIN'S: Beats 45%
  • Hot-day cooling efficiencyEER2MANASTIN: Beats 26%SLOMIN'S: Beats 17%

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

    MANASTIN
    40%
    SLOMIN'S
    80%

  • Xcel CC

    MANASTIN
    60%
    SLOMIN'S
    60%

  • CEE Advanced

    MANASTIN
    0%
    SLOMIN'S
    0%

  • ENERGY STAR CC

    MANASTIN
    0%
    SLOMIN'S
    0%

Top cold-climate picks, ducted 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 Ducted, Up to 1.5 tons (under 21,000 Btu/h cooling). What size is my system?

MANASTIN

No ducted, up to 1.5 tons model from MANASTIN.

SLOMIN'S

No ducted, up to 1.5 tons model from SLOMIN'S.

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