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ELIOS vs SLIMAIR: heat pump ratings compared

Against heat pumps of the same size and type, a typical ELIOS model beats 56% and a typical SLIMAIR model 60%. SLIMAIR rates slightly higher overall.

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

ELIOS

56%

of similar heat pumps beaten by its typical model

Above average

48 models listed

SLIMAIR

60%

of similar heat pumps beaten by its typical model

Well above average

48 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°FELIOS: Beats 57%SLIMAIR: Beats 60%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FELIOS: Beats 53%SLIMAIR: Beats 59%
  • Winter-long heating efficiencyHSPF2ELIOS: Beats 65%SLIMAIR: Beats 73%
  • Summer-long cooling efficiencySEER2ELIOS: Beats 59%SLIMAIR: Beats 61%
  • Hot-day cooling efficiencyEER2ELIOS: Beats 49%SLIMAIR: Beats 53%

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

    ELIOS
    88%
    SLIMAIR
    90%

  • Xcel CC

    ELIOS
    81%
    SLIMAIR
    77%

  • CEE Advanced

    ELIOS
    0%
    SLIMAIR
    2%

  • ENERGY STAR CC

    ELIOS
    77%
    SLIMAIR
    79%

Top cold-climate picks, ductless 5 tons and up

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, 5 tons and up (57,000 Btu/h and up cooling). What size is my system?

ELIOS

No ductless, 5 tons and up model from ELIOS.

SLIMAIR

None of SLIMAIR’s ductless, 5 tons and up models qualifies.

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