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COSTWAY vs GARVEE heat pumps

Measured against models of the same size and duct type, COSTWAY scores higher on 5 of the 6 ratings. COSTWAY has 47 outdoor models, GARVEE has 46 outdoor models. GARVEE has no QMID on file and is not ranked.

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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.
COSTWAY and GARVEE 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, COSTWAY scores higher on 5 of the 6 ratings.
  • COSTWAY
  • GARVEE
  • Other ranked manufacturers
COSTWAYGARVEE

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingCOSTWAYGARVEE
Efficiency index46% (higher)median — · 26th ranked39% (higher)median —
COP at 5°F57% (higher)median 2.00 · 13th ranked47% (higher)median 2.00
Capacity retention at 5°F35%median 70% · 27th ranked36%median 72%
HSPF245% (higher)median 9.0 · 18th ranked39% (higher)median 9.5
SEER249% (higher)median 20.5 · 18th ranked40% (higher)median 20.3
EER236% (higher)median 11.0 · 29th ranked34% (higher)median 11.1
Heating capacity at 5°F39% (higher)median 11,600 Btu/h · 26th ranked38% (higher)median 9,150 Btu/h
Outdoor models4746
AHRI certifications4846

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardCOSTWAYGARVEE
CEE 2025 Tier 1 (Split ASHP)63.8%30 models73.9%34 models
CEE 2026 Tier 1 (Split ASHP)63.8%30 models73.9%34 models
CEE Advanced Tier (Split ASHP)0%0 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)42.6%20 models69.6%32 models
DOE Cold Climate Heat Pump Challenge0%0 models0%0 models
ENERGY STAR Cold Climate29.8%14 models13%6 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 · 3 groups where both have models
  • COSTWAY
  • GARVEE
  • All models of the group
Ducted, 2 tons2.001,090 modelsDucted, 2.5–3 tons2.001,909 modelsDucted, 3.5–4.5 tons2.002,224 modelsNon-ducted, up to 1.5 tons1.953,455 modelsNon-ducted, 2 tons2.00863 modelsNon-ducted, 2.5–3 tons2.001,106 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 typeCOSTWAYGARVEE
Ducted, 2 tons1 · index 37%None
Ducted, 2.5–3 tons4 · index 61%None
Ducted, 3.5–4.5 tons2 · index 46%None
Non-ducted, up to 1.5 tons29 · index 41%33 · index 38%
Non-ducted, 2 tons9 · index 50%7 · index 43%
Non-ducted, 2.5–3 tons3 · index 65%6 · index 38%

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 typeCOSTWAYCold-climate score, best modelGARVEECold-climate score, best model
Ducted, 2 tons42.5(50 is the typical model of its size class)FP11018USwith ducted air handler FP11021US1 of 1 models qualify · AHRI 217169696No models in this size class
Ducted, 2.5–3 tons64.8(50 is the typical model of its size class)FP10982USwith ducted air handler FP10985US4 of 4 models qualify · AHRI 217221416No models in this size class
Ducted, 3.5–4.5 tons64.7(50 is the typical model of its size class)FP10983USwith ducted air handler FP10986US2 of 2 models qualify · AHRI 217221417No models in this size class
Non-ducted, up to 1.5 tons79.2(50 is the typical model of its size class) (higher)FP10897US-12WHwith ductless indoor unit FP10897US-22WH10 of 29 models qualify · AHRI 21587663568.6(50 is the typical model of its size class)GMS1D2 PRO24 of 33 models qualify · AHRI 217752817
Non-ducted, 2 tons77.4(50 is the typical model of its size class)FP10898US-12WHwith ductless indoor unit FP10898US-22WH2 of 9 models qualify · AHRI 21717869777.5(50 is the typical model of its size class) (higher)ZAC24-2-S22-Awith ductless indoor unit ZAC24-2-S22-B3 of 7 models qualify · AHRI 218630930
Non-ducted, 2.5–3 tons57.5(50 is the typical model of its size class)FP11134US*3 of 3 models qualify · AHRI 21875259457.5(50 is the typical model of its size class)GMS1D3 PRO5 of 6 models qualify · AHRI 217752818

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 typeCOSTWAYAll-around score, best modelGARVEEAll-around score, best model
Ducted, 2 tons37.2(50 is the typical model of its size class)FP11018USwith ducted air handler FP11021US1 of 1 models have all five ratings · AHRI 217169696No models in this size class
Ducted, 2.5–3 tons67.3(50 is the typical model of its size class)FP10982USwith ducted air handler FP10985US4 of 4 models have all five ratings · AHRI 217221416No models in this size class
Ducted, 3.5–4.5 tons54.1(50 is the typical model of its size class)FP10983USwith ducted air handler FP10986US2 of 2 models have all five ratings · AHRI 217221417No models in this size class
Non-ducted, up to 1.5 tons82.9(50 is the typical model of its size class) (higher)FP10897US-12WHwith ductless indoor unit FP10897US-22WH24 of 29 models have all five ratings · AHRI 21587663572.2(50 is the typical model of its size class)GMS1D2 PRO33 of 33 models have all five ratings · AHRI 217752817
Non-ducted, 2 tons86.5(50 is the typical model of its size class) (higher)FP10898US-12WHwith ductless indoor unit FP10898US-22WH8 of 9 models have all five ratings · AHRI 21717869768.1(50 is the typical model of its size class)ZAC24-2-S22-Awith ductless indoor unit ZAC24-2-S22-B7 of 7 models have all five ratings · AHRI 218630930
Non-ducted, 2.5–3 tons66.6(50 is the typical model of its size class) (higher)FP10840US-WH3 of 3 models have all five ratings · AHRI 21677132865.1(50 is the typical model of its size class)GMS1D3 PRO6 of 6 models have all five ratings · AHRI 217752818

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
RatingCOSTWAYGARVEE
COP at 5°Fbeats 89% · 2.25FP10897US-12WHNon-ducted, up to 1.5 tonsbeats 88% · 2.10GMS36Non-ducted, 2.5–3 tons
Capacity retention at 5°Fbeats 79% · 90%FP10841US-WHNon-ducted, 2 tonsbeats 83% · 98%SAC9-2-S18.5-BNon-ducted, up to 1.5 tons
HSPF2beats 96% · 10.5FP11135US*Ducted, 2.5–3 tonsbeats 81% · 10.4GMSC24-ANon-ducted, 2 tons
SEER2beats 98% · 21.0FP11134US*Ducted, 2.5–3 tonsbeats 91% · 24.0GMS1D3 PRONon-ducted, 2.5–3 tons
EER2beats 96% · 14.0FP10898US-12WHNon-ducted, 2 tonsbeats 70% · 13.0GMS9-2 PROAlso listed as GMS9 PRONon-ducted, up to 1.5 tons
Heating capacity at 5°Fbeats 86% · 15,000 Btu/hFP10897US-12WHNon-ducted, up to 1.5 tonsbeats 88% · 16,000 Btu/hGMS1D2Non-ducted, up to 1.5 tons

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