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KARDA vs SLIMAIR TECHNOLOGIES: heat pump ratings compared

Against heat pumps of the same size and type, a typical KARDA model beats 66% and a typical SLIMAIR TECHNOLOGIES model 47%. KARDA rates higher overall.

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

KARDA

66%

of similar heat pumps beaten by its typical model

Well above average

11 models listed

SLIMAIR TECHNOLOGIES

47%

of similar heat pumps beaten by its typical model

About average

11 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°FKARDA: Beats 38%SLIMAIR TECHNOLOGIES: Beats 14%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FKARDA: Beats 67%SLIMAIR TECHNOLOGIES: Beats 33%
  • Winter-long heating efficiencyHSPF2KARDA: Beats 78%SLIMAIR TECHNOLOGIES: Beats 32%
  • Summer-long cooling efficiencySEER2KARDA: Beats 78%SLIMAIR TECHNOLOGIES: Beats 32%
  • Hot-day cooling efficiencyEER2KARDA: Beats 63%SLIMAIR TECHNOLOGIES: Beats 38%

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

    KARDA
    100%
    SLIMAIR TECHNOLOGIES
    18%

  • Xcel CC

    KARDA
    82%
    SLIMAIR TECHNOLOGIES
    9%

  • CEE Advanced

    KARDA
    0%
    SLIMAIR TECHNOLOGIES
    0%

  • ENERGY STAR CC

    KARDA
    73%
    SLIMAIR TECHNOLOGIES
    0%

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?

KARDA

None of KARDA’s ducted, 3.5–4.5 tons models qualifies.

SLIMAIR TECHNOLOGIES

None of SLIMAIR TECHNOLOGIES’s ducted, 3.5–4.5 tons 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