OLMO vs Perfect Aire heat pumps
Measured against models of the same size and duct type, Perfect Aire scores higher on 5 of the 6 ratings. OLMO has 11 outdoor models, Perfect Aire has 7 outdoor models. OLMO and Perfect Aire have no QMID on file and are 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.
- OLMO
- Perfect Aire
- Other ranked manufacturers
Source: AHRI Directory, NEEP · as of
| Rating | OLMO | Perfect Aire |
|---|---|---|
| Efficiency index | 43%median — | 53%median — |
| COP at 5°F | 45% (higher)median 1.98 | 38% (higher)median 1.90 |
| Capacity retention at 5°F | 40%median 74% | 63%median 80% |
| HSPF2 | 33%median 9.0 | 47%median 9.5 |
| SEER2 | 45%median 20.0 | 57%median 22.0 |
| EER2 | 50%median 12.0 | 58%median 12.3 |
| Heating capacity at 5°F | 41%median 18,000 Btu/h | 61%median 18,000 Btu/h |
| Outdoor models | 11 | 7 |
| AHRI certifications | 17 | 10 |
Share of models meeting each standard
| Standard | OLMO | Perfect Aire |
|---|---|---|
| CEE 2025 Tier 1 (Split ASHP) | 90.9%10 models | 85.7%6 models |
| CEE 2026 Tier 1 (Split ASHP) | 81.8%9 models | 85.7%6 models |
| CEE Advanced Tier (Split ASHP) | 0%0 models | 0%0 models |
| Xcel Energy Colorado cold-climate ASHP (2025) | 54.5%6 models | 85.7%6 models |
| DOE Cold Climate Heat Pump Challenge | 0%0 models | 0%0 models |
| ENERGY STAR Cold Climate | 36.4%4 models | 85.7%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.
- OLMO
- Perfect Aire
- 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 | OLMO | Perfect Aire |
|---|---|---|
| Non-ducted, up to 1.5 tons | 6 · index 43% | 4 · index 58% |
| Non-ducted, 2 tons | 1 · index 34% | 1 · index 61% |
| Non-ducted, 2.5–3 tons | 3 · index 47% | 2 · index 40% |
| Non-ducted, 3.5–4.5 tons | 1 · index 44% | 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
| Size and duct type | OLMOCold-climate score, best model | Perfect AireCold-climate score, best model |
|---|---|---|
| Non-ducted, up to 1.5 tons | 69.5(50 is the typical model of its size class)OS-RMS18-230VO2 of 6 models qualify · AHRI 217739001 | 69.5(50 is the typical model of its size class)4PAMSHHQC18-MZO24 of 4 models qualify · AHRI 218792068 |
| Non-ducted, 2 tons | 38.8(50 is the typical model of its size class)OS-SR24-230VOwith ductless indoor unit OS-A24SRW-230VI1 of 1 models qualify · AHRI 218752476 | 54.1(50 is the typical model of its size class) (higher)4PAMSHQCO24with ductless indoor unit 4PAMSHQCW24-21 of 1 models qualify · AHRI 217747132 |
| Non-ducted, 2.5–3 tons | 53.7(50 is the typical model of its size class) (higher)OS-RMS36-230VO2 of 3 models qualify · AHRI 217739004 | 50.2(50 is the typical model of its size class)4PAMSHHQC27-MZO31 of 2 models qualify · AHRI 218792069 |
| Non-ducted, 3.5–4.5 tons | 16.4(50 is the typical model of its size class)OS-RMS42-230VO1 of 1 models qualify · AHRI 217739003 | No models in this size class |
All-around best
| Size and duct type | OLMOAll-around score, best model | Perfect AireAll-around score, best model |
|---|---|---|
| Non-ducted, up to 1.5 tons | 69.2(50 is the typical model of its size class)OS-RMS18-230VO6 of 6 models have all five ratings · AHRI 217739001 | 69.2(50 is the typical model of its size class)4PAMSHHQC18-MZO24 of 4 models have all five ratings · AHRI 218792068 |
| Non-ducted, 2 tons | 34.1(50 is the typical model of its size class)OS-SR24-230VOwith ductless indoor unit OS-A24SRW-230VI1 of 1 models have all five ratings · AHRI 218752476 | 61.3(50 is the typical model of its size class) (higher)4PAMSHQCO24with ductless indoor unit 4PAMSHQCW24-21 of 1 models have all five ratings · AHRI 217747132 |
| Non-ducted, 2.5–3 tons | 64.2(50 is the typical model of its size class)OS-RMS27-230VO3 of 3 models have all five ratings · AHRI 217739002 | 64.2(50 is the typical model of its size class)4PAMSHHQC27-MZO32 of 2 models have all five ratings · AHRI 218792069 |
| Non-ducted, 3.5–4.5 tons | 43.7(50 is the typical model of its size class)OS-RMS42-230VO1 of 1 models have all five ratings · AHRI 217739003 | No models in this size class |
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 | OLMO | Perfect Aire |
|---|---|---|
| COP at 5°F | beats 100% · 2.53OS-SR18-230VONon-ducted, up to 1.5 tons | beats 56% · 1.994PAMSHHQC18-MZO2Non-ducted, up to 1.5 tons |
| Capacity retention at 5°F | beats 87% · 100%OS-RMS18-230VONon-ducted, up to 1.5 tons | beats 87% · 100%4PAMSHQCO18Non-ducted, up to 1.5 tons |
| HSPF2 | beats 64% · 10.0OS-RMS18-230VONon-ducted, up to 1.5 tons | beats 64% · 10.04PAMSHQCO18Non-ducted, up to 1.5 tons |
| SEER2 | beats 75% · 23.0OS-RMS27-230VONon-ducted, 2.5–3 tons | beats 75% · 23.04PAMSHHQC27-MZO3Non-ducted, 2.5–3 tons |
| EER2 | beats 80% · 12.9OS-RMS27-230VONon-ducted, 2.5–3 tons | beats 80% · 12.94PAMSHHQC27-MZO3Non-ducted, 2.5–3 tons |
| Heating capacity at 5°F | beats 93% · 18,000 Btu/hOS-RMS18-230VONon-ducted, up to 1.5 tons | beats 93% · 18,000 Btu/h4PAMSHQCO18Non-ducted, up to 1.5 tons |