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OLMO vs Perfect Aire heat pumps

Measured against models of the same size and duct type, Perfect Aire scores higher on 4 of the 6 ratings. OLMO has 20 outdoor models, Perfect Aire has 21 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 and Perfect Aire 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, Perfect Aire scores higher on 4 of the 6 ratings.
  • OLMO
  • Perfect Aire
  • Other ranked manufacturers
OLMOPerfect …

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingOLMOPerfect Aire
Efficiency index38%median —56%median —
COP at 5°F44% (higher)median 1.8643% (higher)median 1.86
Capacity retention at 5°F37%median 62%70%median 81%
HSPF242% (higher)median 8.835% (higher)median 9.0
SEER243%median 18.445%median 21.0
EER227%median 10.147%median 12.5
Heating capacity at 5°F37%median 17,200 Btu/h61%median 13,770 Btu/h
Outdoor models2021
AHRI certifications2121

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardOLMOPerfect Aire
CEE 2025 Tier 1 (Split ASHP)50%10 models71.4%15 models
CEE 2026 Tier 1 (Split ASHP)50%10 models71.4%15 models
CEE Advanced Tier (Split ASHP)0%0 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)40%8 models71.4%15 models
DOE Cold Climate Heat Pump Challenge0%0 models0%0 models
ENERGY STAR Cold Climate40%8 models47.6%10 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
  • OLMO
  • Perfect Aire
  • All models of the group
Ducted, 2 tons2.00821 modelsDucted, 2.5–3 tons1.901,614 modelsDucted, 3.5–4.5 tons1.911,492 modelsNon-ducted, up to 1.5 tons1.902,417 modelsNon-ducted, 2 tons1.87611 modelsNon-ducted, 2.5–3 tons1.85975 modelsNon-ducted, 3.5–4.5 tons1.97438 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 typeOLMOPerfect Aire
Ducted, 2 tons1 · index 46%None
Ducted, 2.5–3 tons1 · index 63%None
Ducted, 3.5–4.5 tons2 · index 51%None
Non-ducted, up to 1.5 tons8 · index 30%11 · index 53%
Non-ducted, 2 tons3 · index 32%4 · index 63%
Non-ducted, 2.5–3 tons4 · index 43%6 · index —
Non-ducted, 3.5–4.5 tons1 · index 45%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 typeOLMOCold-climate score, best modelPerfect AireCold-climate score, best model
Ducted, 2 tons57.5(50 is the typical model of its size class)OS-EAH24-230VOwith ducted air handler OS-EAH24-230VI1 of 1 models qualify · AHRI 215441503No models in this size class
Ducted, 2.5–3 tons75.1(50 is the typical model of its size class)OS-EAH36-230VOwith ducted air handler OS-EAH36-230VI1 of 1 models qualify · AHRI 215441504No models in this size class
Ducted, 3.5–4.5 tons56.6(50 is the typical model of its size class)OS-EAH48-230VOwith ducted air handler OS-EAH48-230VI1 of 2 models qualify · AHRI 215441505No models in this size class
Non-ducted, up to 1.5 tons56.0(50 is the typical model of its size class)OS-MSR18-230VO2 of 8 models qualify · AHRI 21458477762.1(50 is the typical model of its size class) (higher)3PAMSHQCO09with ductless indoor unit 3PAMSHQCW09Also listed as UB1MSHQCO0911 of 11 models qualify · AHRI 205653641
Non-ducted, 2 tons56.8(50 is the typical model of its size class)OS-MSR24-230VO1 of 3 models qualify · AHRI 21458477564.0(50 is the typical model of its size class) (higher)3PAMSHQCO24with ductless indoor unit 3PAMSHQCW24Also listed as UB1MSHQCO244 of 4 models qualify · AHRI 205653644
Non-ducted, 2.5–3 tons64.0(50 is the typical model of its size class)OS-MSR36-230VO1 of 4 models qualify · AHRI 214584776None on this board (0 of 6 models qualify)
Non-ducted, 3.5–4.5 tons41.8(50 is the typical model of its size class)OS-MSR42-230VO1 of 1 models qualify · AHRI 215387338No 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 typeOLMOAll-around score, best modelPerfect AireAll-around score, best model
Ducted, 2 tons46.3(50 is the typical model of its size class)OS-EAH24-230VOwith ducted air handler OS-EAH24-230VI1 of 1 models have all five ratings · AHRI 215441503No models in this size class
Ducted, 2.5–3 tons63.2(50 is the typical model of its size class)OS-EAH36-230VOwith ducted air handler OS-EAH36-230VI1 of 1 models have all five ratings · AHRI 215441504No models in this size class
Ducted, 3.5–4.5 tons57.3(50 is the typical model of its size class)OS-EAH48-230VOwith ducted air handler OS-EAH48-230VI2 of 2 models have all five ratings · AHRI 215441505No models in this size class
Non-ducted, up to 1.5 tons52.2(50 is the typical model of its size class)OS-MSR18-230VO8 of 8 models have all five ratings · AHRI 21458477756.5(50 is the typical model of its size class) (higher)3PAMSHQCO18with ductless indoor unit 3PAMSHQCW18Also listed as 3PAMSHQCO18-U230, UB1MSHQCO1811 of 11 models have all five ratings · AHRI 205653643
Non-ducted, 2 tons67.5(50 is the typical model of its size class)OS-MSR24-230VO3 of 3 models have all five ratings · AHRI 21458477567.5(50 is the typical model of its size class)3PAMSHHQC24-MZO3Also listed as UB1MSHHQC24-MZO34 of 4 models have all five ratings · AHRI 206428592
Non-ducted, 2.5–3 tons69.5(50 is the typical model of its size class)OS-MSR36-230VO4 of 4 models have all five ratings · AHRI 214584776None on this board (0 of 6 models have all five ratings)
Non-ducted, 3.5–4.5 tons44.5(50 is the typical model of its size class)OS-MSR42-230VO1 of 1 models have all five ratings · AHRI 215387338No 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
RatingOLMOPerfect Aire
COP at 5°Fbeats 78% · 2.10OS-EL09ALP230VONon-ducted, up to 1.5 tonsbeats 81% · 2.133PAMSHQCO24Also listed as UB1MSHQCO24Non-ducted, 2 tons
Capacity retention at 5°Fbeats 99% · 113%OS-MSR36-230VONon-ducted, 2.5–3 tonsbeats 84% · 100%3PAMSHHQC24-MZO3Also listed as UB1MSHHQC24-MZO3Non-ducted, 2 tons
HSPF2beats 83% · 9.5OS-EAH36-230VODucted, 2.5–3 tonsbeats 57% · 9.53PAMSHQCO12Also listed as UB1MSHQCO12Non-ducted, up to 1.5 tons
SEER2beats 85% · 22.0OS-MSR24-230VONon-ducted, 2 tonsbeats 85% · 22.03PAMSHHQC24-MZO3Also listed as UB1MSHHQC24-MZO3Non-ducted, 2 tons
EER2beats 84% · 12.5OS-MSR36-230VONon-ducted, 2.5–3 tonsbeats 80% · 13.73PAMSHQCO09-U230Non-ducted, up to 1.5 tons
Heating capacity at 5°Fbeats 92% · 18,000 Btu/hOS-MSR18-230VONon-ducted, up to 1.5 tonsbeats 92% · 18,000 Btu/h3PAMSHHQC18-MZO2Also listed as UB1MSHHQC18-MZO2Non-ducted, up to 1.5 tons

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