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Bosch vs COSTWAY heat pumps

Measured against models of the same size and duct type, Bosch scores higher on 6 of the 6 ratings. Bosch has 47 outdoor models, COSTWAY has 47 outdoor models.

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CompareData as of updated · sources

Against comparable models

Each cell is the share of same-size, same-type models that the manufacturer’s typical model beats (50% is typical); the higher score is in bold. Raw medians are underneath for context: they depend on which sizes each one makes, so they are not compared.
Bosch and COSTWAY on every ratingPeer scores, 0–100 · grey ticks: every ranked manufacturer · shaded: the middle half of each one’s modelsMeasured against models of the same size and duct type, Bosch scores higher on 6 of the 6 ratings.
  • Bosch
  • COSTWAY
  • Other ranked manufacturers
BoschCOSTWAY

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingBoschCOSTWAY
Efficiency index62% (higher)median — · 3rd ranked46% (higher)median — · 26th ranked
COP at 5°F63% (higher)median 2.10 · 5th ranked57% (higher)median 2.00 · 13th ranked
Capacity retention at 5°F62% (higher)median 75% · 4th ranked35% (higher)median 70% · 27th ranked
HSPF268% (higher)median 9.5 · 4th ranked45% (higher)median 9.0 · 18th ranked
SEER265% (higher)median 19.0 · 3rd ranked49% (higher)median 20.5 · 18th ranked
EER255% (higher)median 11.7 · 12th ranked36% (higher)median 11.0 · 29th ranked
Heating capacity at 5°F65% (higher)median 23,000 Btu/h · 4th ranked39% (higher)median 11,600 Btu/h · 26th ranked
Outdoor models4747
AHRI certifications1,78948

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardBoschCOSTWAY
CEE 2025 Tier 1 (Split ASHP)93.6%44 models63.8%30 models
CEE 2026 Tier 1 (Split ASHP)91.5%43 models63.8%30 models
CEE Advanced Tier (Split ASHP)14.9%7 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)83%39 models42.6%20 models
DOE Cold Climate Heat Pump Challenge14.9%7 models0%0 models
ENERGY STAR Cold Climate85.1%40 models29.8%14 models

Sizes and duct types offered

Models in each peer group, with the efficiency index of those models against the rest of the group.
Side by side, inside each size and duct typeShape: every model of the group · bars: each manufacturer’s middle half, median dot, 10th–90th line · 6 groups where both have models
  • Bosch
  • COSTWAY
  • All models of the group
Ducted, up to 1.5 tons1.901,783 modelsDucted, 2 tons2.001,090 modelsDucted, 2.5–3 tons2.001,909 modelsDucted, 3.5–4.5 tons2.002,224 modelsDucted, 5 tons and up2.00321 modelsNon-ducted, up to 1.5 tons1.953,455 modelsNon-ducted, 2 tons2.00863 modelsNon-ducted, 2.5–3 tons2.001,106 modelsNon-ducted, 3.5–4.5 tons2.00564 modelsNon-ducted, 5 tons and up2.0585 modelsmedian

Raw ratings are only placed side by side within one size and duct type, where they are comparable.

Source: AHRI Directory · as of

Models per peer group · efficiency index within the group
Size and duct typeBoschCOSTWAY
Ducted, up to 1.5 tons10 · index 70%None
Ducted, 2 tons7 · index 65%1 · index 37%
Ducted, 2.5–3 tons12 · index 55%4 · index 61%
Ducted, 3.5–4.5 tons11 · index 68%2 · index 46%
Ducted, 5 tons and up4 · index 63%None
Non-ducted, up to 1.5 tons9 · index 71%29 · index 41%
Non-ducted, 2 tons3 · index 64%9 · index 50%
Non-ducted, 2.5–3 tons10 · index 51%3 · index 65%
Non-ducted, 3.5–4.5 tons3 · index 60%None
Non-ducted, 5 tons and up2 · index 35%None

Cold-climate and all-around picks, size class by size class

Each manufacturer’s best model on each board in every size and duct type, side by side; the higher score is in bold. Both scores are 0–100 against every model of that size class (the line on each bar is 50, the typical model there), so the two compare fairly even when they make different sizes.

Cold-climate picks

Best cold-climate pick per size and duct type (keeps at least 70% of its heat at 5°F). Qualifies when its capacity retention at 5°F (capacity at 5°F as a share of capacity at 47°F) is at least 70% and Capacity retention at 5°F, COP at 5°F, HSPF2 are all rated. Score = the equal-weight mean of its peer percentiles on Capacity retention at 5°F, COP at 5°F, HSPF2 (share of the other models in its peer group it beats, 0–100), all from one certified pairing: in each duct type a model is sold in, its qualifying pairing of that type with the best score; equal scores (one decimal) go to the higher heating capacity at 5°F.
Size and duct typeBoschCold-climate score, best modelCOSTWAYCold-climate score, best model
Ducted, up to 1.5 tons80.1(50 is the typical model of its size class)BMS500-AAS009-1CSXRDwith ducted air handler BMS500-AAU009-1AHDXD10 of 10 models qualify · AHRI 215223297No models in this size class
Ducted, 2 tons85.7(50 is the typical model of its size class) (higher)BMS500-AAS024-1CSXHDwith ducted air handler BMS500-AAU024-1AHDXD8 of 8 models qualify · AHRI 21522329142.5(50 is the typical model of its size class)FP11018USwith ducted air handler FP11021US1 of 1 models qualify · AHRI 217169696
Ducted, 2.5–3 tons83.7(50 is the typical model of its size class) (higher)BOVB-36MTB-M19Ewith ducted air handler BIVB-36MCB-M19X8 of 12 models qualify · AHRI 21790312164.8(50 is the typical model of its size class)FP10982USwith ducted air handler FP10985US4 of 4 models qualify · AHRI 217221416
Ducted, 3.5–4.5 tons90.9(50 is the typical model of its size class) (higher)BOVA-60MTB-M19Ewith ducted air handler AE*L+DM60B4Z+TXV+TDR10 of 10 models qualify · AHRI 21869351864.7(50 is the typical model of its size class)FP10983USwith ducted air handler FP10986US2 of 2 models qualify · AHRI 217221417
Ducted, 5 tons and up63.4(50 is the typical model of its size class)BPBA-60RCB-M18SAlso listed as BPBB-60RTB-M18S3 of 4 models qualify · AHRI 216011943No models in this size class
Non-ducted, up to 1.5 tons97.5(50 is the typical model of its size class) (higher)BMS500-AAS009-1CSXRDwith ductless indoor unit BMS500-AAU006-1AHWXD8 of 9 models qualify · AHRI 21765683279.2(50 is the typical model of its size class)FP10897US-12WHwith ductless indoor unit FP10897US-22WH10 of 29 models qualify · AHRI 215876635
Non-ducted, 2 tons89.4(50 is the typical model of its size class) (higher)BMS500-AAS024-1CSXHDwith ductless indoor unit BMS500-AAU024-1AHCXD3 of 3 models qualify · AHRI 21522329277.4(50 is the typical model of its size class)FP10898US-12WHwith ductless indoor unit FP10898US-22WH2 of 9 models qualify · AHRI 217178697
Non-ducted, 2.5–3 tons78.0(50 is the typical model of its size class) (higher)BMS500-AAM036-1CSXHD8 of 10 models qualify · AHRI 21522332457.5(50 is the typical model of its size class)FP11134US*3 of 3 models qualify · AHRI 218752594
Non-ducted, 3.5–4.5 tons73.4(50 is the typical model of its size class)BMS500-AAM048-1CSXHD3 of 3 models qualify · AHRI 215223327No models in this size class
Non-ducted, 5 tons and up50.6(50 is the typical model of its size class)BOHA-60MTB-M18S2 of 2 models qualify · AHRI 218059677No models in this size class

All-around best

Best all-around model per size and duct type. Score = 50% heating, the mean of its peer percentiles on COP at 5°F, Capacity retention at 5°F, HSPF2, plus 50% cooling, the mean of its peer percentiles on SEER2 and EER2 (share of the other models in its peer group it beats, 0–100). All five ratings are required; there is no minimum heat kept at 5°F. In each duct type a model is sold in, it is scored on its pairing of that type with the best score; equal scores (one decimal) go to the higher cold-climate score, then the higher heating capacity at 5°F.
Size and duct typeBoschAll-around score, best modelCOSTWAYAll-around score, best model
Ducted, up to 1.5 tons86.7(50 is the typical model of its size class)BMS500-AAS009-1CSXHDwith ducted air handler BMS500-AAU009-1AHDXD10 of 10 models have all five ratings · AHRI 215223281No models in this size class
Ducted, 2 tons85.6(50 is the typical model of its size class) (higher)BOVA-36RTB-M20Swith ducted air handler L(E,G)M36FJ9 of 9 models have all five ratings · AHRI 21788795137.2(50 is the typical model of its size class)FP11018USwith ducted air handler FP11021US1 of 1 models have all five ratings · AHRI 217169696
Ducted, 2.5–3 tons83.6(50 is the typical model of its size class) (higher)BMS500-AAM036-1CSXHD10 of 10 models have all five ratings · AHRI 21522332367.3(50 is the typical model of its size class)FP10982USwith ducted air handler FP10985US4 of 4 models have all five ratings · AHRI 217221416
Ducted, 3.5–4.5 tons86.3(50 is the typical model of its size class) (higher)BOVA-60MTB-M19Ewith ducted air handler (V,R)60H210P19*+TXV+AEFE511 of 11 models have all five ratings · AHRI 21879693854.1(50 is the typical model of its size class)FP10983USwith ducted air handler FP10986US2 of 2 models have all five ratings · AHRI 217221417
Ducted, 5 tons and up70.1(50 is the typical model of its size class)BPBA-60RCB-M18SAlso listed as BPBB-60RTB-M18S4 of 4 models have all five ratings · AHRI 216011943No models in this size class
Non-ducted, up to 1.5 tons95.8(50 is the typical model of its size class) (higher)BMS500-AAS009-1CSXRDwith ductless indoor unit BMS500-AAU006-1AHWXD9 of 9 models have all five ratings · AHRI 21765683282.9(50 is the typical model of its size class)FP10897US-12WHwith ductless indoor unit FP10897US-22WH24 of 29 models have all five ratings · AHRI 215876635
Non-ducted, 2 tons86.8(50 is the typical model of its size class) (higher)BMS500-AAS024-1CSXRDwith ductless indoor unit BMS500-AAU024-1AHWXD3 of 3 models have all five ratings · AHRI 21522330686.5(50 is the typical model of its size class)FP10898US-12WHwith ductless indoor unit FP10898US-22WH8 of 9 models have all five ratings · AHRI 217178697
Non-ducted, 2.5–3 tons78.3(50 is the typical model of its size class) (higher)BMS500-AAM036-1CSXHD10 of 10 models have all five ratings · AHRI 21522332266.6(50 is the typical model of its size class)FP10840US-WH3 of 3 models have all five ratings · AHRI 216771328
Non-ducted, 3.5–4.5 tons75.6(50 is the typical model of its size class)BMS500-AAM048-1CSXHD3 of 3 models have all five ratings · AHRI 215223325No models in this size class
Non-ducted, 5 tons and up36.0(50 is the typical model of its size class)BOHA-60MTB-M18S2 of 2 models have all five ratings · AHRI 218059677No models in this size class

All-around board, every manufacturer

Standout model on each rating

Each manufacturer’s model that beats the largest share of comparable models on the rating; the higher share is in bold.
Top model per rating by peer percentile, with its AHRI-certified value and peer group
RatingBoschCOSTWAY
COP at 5°Fbeats 99% · 2.73BOHA-24MTB-M18SDucted, up to 1.5 tonsbeats 89% · 2.25FP10897US-12WHNon-ducted, up to 1.5 tons
Capacity retention at 5°Fbeats 100% · 127%BOVA-60MTB-M19EDucted, 3.5–4.5 tonsbeats 79% · 90%FP10841US-WHNon-ducted, 2 tons
HSPF2beats 99% · 11.0BMS500-AAM048-1CSXHDDucted, 3.5–4.5 tonsbeats 96% · 10.5FP11135US*Ducted, 2.5–3 tons
SEER2beats 97% · 25.0BMS500-AAM027-1CSXRDNon-ducted, 2.5–3 tonsbeats 98% · 21.0FP11134US*Ducted, 2.5–3 tons
EER2beats 100% · 18.1BMS500-AAS009-1CSXRDNon-ducted, up to 1.5 tonsbeats 96% · 14.0FP10898US-12WHNon-ducted, 2 tons
Heating capacity at 5°Fbeats 100% · 64,000 Btu/hBOVA-60MTB-M19EDucted, 3.5–4.5 tonsbeats 86% · 15,000 Btu/hFP10897US-12WHNon-ducted, up to 1.5 tons

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