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Bosch vs COSTWAY: heat pump ratings compared

Against heat pumps of the same size and type, a typical Bosch model beats 62% and a typical COSTWAY model 46%. Bosch rates higher overall.

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

Bosch

62%

of similar heat pumps beaten by its typical model

Well above average

47 models listed

COSTWAY

46%

of similar heat pumps beaten by its typical model

About average

47 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°FBosch: Beats 63%COSTWAY: Beats 57%
  • Heating power kept at 5°FCapacity at 5°F vs 47°FBosch: Beats 62%COSTWAY: Beats 35%
  • Winter-long heating efficiencyHSPF2Bosch: Beats 68%COSTWAY: Beats 45%
  • Summer-long cooling efficiencySEER2Bosch: Beats 65%COSTWAY: Beats 49%
  • Hot-day cooling efficiencyEER2Bosch: Beats 55%COSTWAY: Beats 36%

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

    Bosch
    94%
    COSTWAY
    64%

  • Xcel CC

    Bosch
    83%
    COSTWAY
    43%

  • CEE Advanced

    Bosch
    15%
    COSTWAY
    0%

  • ENERGY STAR CC

    Bosch
    85%
    COSTWAY
    30%

All-around best, ductless 2 tons

Balances heating (5°F output and efficiency, HSPF2) and cooling (SEER2, EER2), each rating against units their size.

Showing Ductless, 2 tons (21,000–26,999 Btu/h cooling). What size is my system?

Bosch

  1. 1BMS500-AAS024-1CSXRDwith ductless indoor unit BMS500-AAU024-1AHWXDBosch2 tons · 24,000 Btu/h · DuctlessCold-climate pick, score 84.5Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    78% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.54 (COP at 5°F)
    Top 10%
    Winter efficiency
    11.7 (HSPF2)
    Top 10%
    Cooling efficiency
    23.0 (SEER2)
    Great
    Hot-day cooling
    14.0 (EER2)
    Top 10%
    86.8score / 100Heating 85 · Cooling 89
  2. 2BMS500-AAS024-1CSXHDwith ductless indoor unit BMS500-AAU024-1AHWXDBosch2 tons · 24,000 Btu/h · DuctlessCold-climate pick, score 89.4Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    83% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    2.34 (COP at 5°F)
    Top 10%
    Winter efficiency
    13.5 (HSPF2)
    Top 10%
    Cooling efficiency
    21.0 (SEER2)
    Below the middle
    Hot-day cooling
    13.0 (EER2)
    Great
    76.4score / 100Heating 88 · Cooling 65
  3. 3BOHA-24RTB-M18SBosch2 tons · 23,200 Btu/h · DuctlessCold-climate pick, score 39.8Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    78% (Capacity at 5°F vs 47°F)
    Good
    Efficiency at 5°F
    1.80 (COP at 5°F)
    Below the middle
    Winter efficiency
    9.5 (HSPF2)
    Below the middle
    Cooling efficiency
    17.3 (SEER2)
    Below the middle
    Hot-day cooling
    11.0 (EER2)
    Below the middle
    29.5score / 100Heating 40 · Cooling 19

COSTWAY

  1. 1FP10898US-12WHwith ductless indoor unit FP10898US-22WHCOSTWAY2 tons · 22,400 Btu/h · DuctlessCold-climate pick, score 77.4Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    85% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    2.10 (COP at 5°F)
    Good
    Winter efficiency
    10.5 (HSPF2)
    Great
    Cooling efficiency
    25.0 (SEER2)
    Top 10%
    Hot-day cooling
    14.0 (EER2)
    Top 10%
    86.5score / 100Heating 77 · Cooling 96
  2. 2FP10841US-WHCOSTWAY2 tons · 24,000 Btu/h · DuctlessCold-climate pick, score 67.5Meets CEE 2025, CEE 2026, Xcel CC, ENERGY STAR CC
    Heat kept at 5°F
    90% (Capacity at 5°F vs 47°F)
    Great
    Efficiency at 5°F
    2.00 (COP at 5°F)
    Good
    Winter efficiency
    10.0 (HSPF2)
    Good
    Cooling efficiency
    23.0 (SEER2)
    Great
    Hot-day cooling
    12.5 (EER2)
    Good
    71.8score / 100Heating 68 · Cooling 76
  3. 3FP10524US-12WHwith ductless indoor unit FP10524US-22WHCOSTWAY2 tons · 22,000 Btu/h · DuctlessNot a cold-climate pick: keeps 24% of its heat at 5°FMeets none of the standards tracked here
    Heat kept at 5°F
    24% (Capacity at 5°F vs 47°F)
    Below the middle
    Efficiency at 5°F
    2.27 (COP at 5°F)
    Great
    Winter efficiency
    10.0 (HSPF2)
    Good
    Cooling efficiency
    21.0 (SEER2)
    Below the middle
    Hot-day cooling
    13.0 (EER2)
    Great
    58.6score / 100Heating 53 · Cooling 65

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