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BOSTON AC vs Coast Air: heat pump ratings compared

Against heat pumps of the same size and type, a typical BOSTON AC model beats 56% and a typical Coast Air model 50%. BOSTON AC rates higher overall.

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

BOSTON AC

56%

of similar heat pumps beaten by its typical model

Above average

6 models listed

Coast Air

50%

of similar heat pumps beaten by its typical model

About average

6 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°FBOSTON AC: Beats 55%Coast Air: Beats 52%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FBOSTON AC: Beats 52%Coast Air: Beats 16%
  • Winter-long heating efficiencyHSPF2BOSTON AC: Beats 45%Coast Air: Beats 46%
  • Summer-long cooling efficiencySEER2BOSTON AC: Beats 65%Coast Air: Beats 54%
  • Hot-day cooling efficiencyEER2BOSTON AC: Beats 59%Coast Air: Beats 48%

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

    BOSTON AC
    100%
    Coast Air
    67%

  • Xcel CC

    BOSTON AC
    83%
    Coast Air
    0%

  • CEE Advanced

    BOSTON AC
    0%
    Coast Air
    0%

  • ENERGY STAR CC

    BOSTON AC
    0%
    Coast Air
    0%

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

BOSTON AC

No ductless, 3.5–4.5 tons model from BOSTON AC.

Coast Air

No ductless, 3.5–4.5 tons model from Coast Air.

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