AC BEST LA vs COSTWAY heat pumps
Measured against models of the same size and duct type, AC BEST LA scores higher on 4 of the 6 ratings. AC BEST LA has 3 outdoor models, COSTWAY has 3 outdoor models. AC BEST LA 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.
- AC BEST LA
- COSTWAY
- Other ranked manufacturers
Source: AHRI Directory, NEEP · as of
| Rating | AC BEST LA | COSTWAY |
|---|---|---|
| Efficiency index | 58% (higher)median — | 48% (higher)median — |
| COP at 5°F | 47% (higher)median 1.86 | 21% (higher)median 1.80 |
| Capacity retention at 5°F | 50% (higher)median 71% | 33% (higher)median 65% |
| HSPF2 | 61% (higher)median 9.2 | 46% (higher)median 9.0 |
| SEER2 | 66%median 21.5 | 76%median 22.0 |
| EER2 | 60% (higher)median 12.5 | 50% (higher)median 12.0 |
| Heating capacity at 5°F | 47%median 14,000 Btu/h | 55%median 16,200 Btu/h |
| Outdoor models | 3 | 3 |
| AHRI certifications | 4 | 3 |
Share of models meeting each standard
| Standard | AC BEST LA | COSTWAY |
|---|---|---|
| CEE 2025 Tier 1 (Split ASHP) | 100%3 models | 100%3 models |
| CEE 2026 Tier 1 (Split ASHP) | 100%3 models | 100%3 models |
| CEE Advanced Tier (Split ASHP) | 0%0 models | 0%0 models |
| Xcel Energy Colorado cold-climate ASHP (2025) | 66.7%2 models | 33.3%1 models |
| DOE Cold Climate Heat Pump Challenge | 0%0 models | 0%0 models |
| ENERGY STAR Cold Climate | 0%0 models | 33.3%1 models |
Sizes and duct types offered
Models in each peer group, with the efficiency index of those models against the rest of the group.
- AC BEST LA
- COSTWAY
- All models of the group
Raw ratings are only placed side by side within one size and duct type, where they are comparable.
Source: AHRI Directory · as of
| Size and duct type | AC BEST LA | COSTWAY |
|---|---|---|
| Ducted, up to 1.5 tons | 1 · index 57% | None |
| Non-ducted, up to 1.5 tons | 2 · index 53% | 1 · index 44% |
| Non-ducted, 2.5–3 tons | 1 · index 67% | 1 · index 51% |
| Non-ducted, 2 tons | None | 1 · index 49% |
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
| Size and duct type | AC BEST LACold-climate score, best model | COSTWAYCold-climate score, best model |
|---|---|---|
| Ducted, up to 1.5 tons | 46.5(50 is the typical model of its size class)M2OA-18HFN1-M1 of 1 models qualify · AHRI 208073237 | No models in this size class |
| Non-ducted, up to 1.5 tons | 57.1(50 is the typical model of its size class) (higher)M2OA-18HFN1-M1 of 2 models qualify · AHRI 208073235 | 36.0(50 is the typical model of its size class)FP10794US-WH1 of 1 models qualify · AHRI 215439580 |
| Non-ducted, 2 tons | No models in this size class | None on this board (0 of 1 models qualify) |
| Non-ducted, 2.5–3 tons | 50.1(50 is the typical model of its size class)M3OJ-27HFN1-M1 of 1 models qualify · AHRI 208073243 | None on this board (0 of 1 models qualify) |
All-around best
| Size and duct type | AC BEST LAAll-around score, best model | COSTWAYAll-around score, best model |
|---|---|---|
| Ducted, up to 1.5 tons | 56.7(50 is the typical model of its size class)M2OA-18HFN1-M1 of 1 models have all five ratings · AHRI 208073237 | No models in this size class |
| Non-ducted, up to 1.5 tons | 54.0(50 is the typical model of its size class) (higher)MOX230-09HFN1-BS5Wwith ductless indoor unit MSAG11A-09HRFN1-BS5W2 of 2 models have all five ratings · AHRI 208073226 | 43.5(50 is the typical model of its size class)FP10794US-WH1 of 1 models have all five ratings · AHRI 215439580 |
| Non-ducted, 2 tons | No models in this size class | 49.4(50 is the typical model of its size class)FP10795US-WH1 of 1 models have all five ratings · AHRI 215439581 |
| Non-ducted, 2.5–3 tons | 67.1(50 is the typical model of its size class) (higher)M3OJ-27HFN1-M1 of 1 models have all five ratings · AHRI 208073243 | 51.2(50 is the typical model of its size class)FP10796US-WH1 of 1 models have all five ratings · AHRI 215439582 |
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.
| Rating | AC BEST LA | COSTWAY |
|---|---|---|
| COP at 5°F | beats 86% · 2.18MOX230-09HFN1-BS5WNon-ducted, up to 1.5 tons | beats 26% · 1.80FP10795US-WHNon-ducted, 2 tons |
| Capacity retention at 5°F | beats 57% · 71%M3OJ-27HFN1-MNon-ducted, 2.5–3 tons | beats 44% · 70%FP10794US-WHNon-ducted, up to 1.5 tons |
| HSPF2 | beats 72% · 10.2M2OA-18HFN1-MNon-ducted, up to 1.5 tons | beats 48% · 9.0FP10795US-WHNon-ducted, 2 tons |
| SEER2 | beats 93% · 23.5M3OJ-27HFN1-MNon-ducted, 2.5–3 tons | beats 85% · 22.0FP10795US-WHNon-ducted, 2 tons |
| EER2 | beats 75% · 12.2M3OJ-27HFN1-MNon-ducted, 2.5–3 tons | beats 67% · 12.0FP10796US-WHNon-ducted, 2.5–3 tons |
| Heating capacity at 5°F | beats 85% · 14,000 Btu/hM2OA-18HFN1-MNon-ducted, up to 1.5 tons | beats 84% · 13,800 Btu/hFP10794US-WHNon-ducted, up to 1.5 tons |