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.

NAPOLEON and OLMO 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, NAPOLEON scores higher on 6 of the 6 ratings.

NAPOLEON
OLMO
Other ranked manufacturers

Source: AHRI Directory, NEEP · as of Oct 11, 2026

Average peer percentile, raw median and rank among ranked manufacturers
Rating	NAPOLEON	OLMO
Efficiency index	65% (higher)median —	43% (higher)median —
COP at 5°F	56% (higher)median 2.00	45% (higher)median 1.98
Capacity retention at 5°F	70% (higher)median 89%	40% (higher)median 74%
HSPF2	78% (higher)median 10.5	33% (higher)median 9.0
SEER2	64% (higher)median 19.5	45% (higher)median 20.0
EER2	60% (higher)median 12.0	50% (higher)median 12.0
Heating capacity at 5°F	69% (higher)median 24,000 Btu/h	41% (higher)median 18,000 Btu/h
Outdoor models	25	11
AHRI certifications	103	17

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	NAPOLEON	OLMO
CEE 2025 Tier 1 (Split ASHP)	76%19 models	90.9%10 models
CEE 2026 Tier 1 (Split ASHP)	76%19 models	81.8%9 models
CEE Advanced Tier (Split ASHP)	4%1 models	0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)	80%20 models	54.5%6 models
DOE Cold Climate Heat Pump Challenge	4%1 models	0%0 models
ENERGY STAR Cold Climate	72%18 models	36.4%4 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 · 4 groups where both have models

NAPOLEON
OLMO
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 Oct 11, 2026

Models per peer group · efficiency index within the group
Size and duct type	NAPOLEON	OLMO
Ducted, up to 1.5 tons	8 · index 63%	None
Ducted, 2 tons	4 · index 58%	None
Ducted, 2.5–3 tons	6 · index 63%	None
Ducted, 3.5–4.5 tons	4 · index 50%	None
Non-ducted, up to 1.5 tons	7 · index 77%	6 · index 43%
Non-ducted, 2 tons	2 · index 72%	1 · index 34%
Non-ducted, 2.5–3 tons	5 · index 66%	3 · index 47%
Non-ducted, 3.5–4.5 tons	1 · index 76%	1 · index 44%

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 type	NAPOLEONCold-climate score, best model	OLMOCold-climate score, best model
Ducted, up to 1.5 tons	82.3(50 is the typical model of its size class)NDHAS26BA-18-Owith ducted air handler NDHASHDBB-186 of 8 models qualify · AHRI 217361777	No models in this size class
Ducted, 2 tons	85.7(50 is the typical model of its size class)NDHAS26BA-24-Owith ducted air handler NDHASHDBB-245 of 5 models qualify · AHRI 217361778	No models in this size class
Ducted, 2.5–3 tons	83.1(50 is the typical model of its size class)NDHAMB-36-O4 of 5 models qualify · AHRI 215213726	No models in this size class
Ducted, 3.5–4.5 tons	82.7(50 is the typical model of its size class)NDHAMBB-48-O4 of 4 models qualify · AHRI 217361789	No models in this size class
Non-ducted, up to 1.5 tons	96.7(50 is the typical model of its size class) (higher)NDHAS26BA-06-Owith ductless indoor unit NDHAS26BB-06-I7 of 7 models qualify · AHRI 217361765	69.5(50 is the typical model of its size class)OS-RMS18-230VO2 of 6 models qualify · AHRI 217739001
Non-ducted, 2 tons	89.2(50 is the typical model of its size class) (higher)NDHAS26BA-24-Owith ductless indoor unit NDHAS26BA-24-I2 of 2 models qualify · AHRI 215931363	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
Non-ducted, 2.5–3 tons	78.0(50 is the typical model of its size class) (higher)NDHAMB-36-O5 of 5 models qualify · AHRI 215213727	53.7(50 is the typical model of its size class)OS-RMS36-230VO2 of 3 models qualify · AHRI 217739004
Non-ducted, 3.5–4.5 tons	73.4(50 is the typical model of its size class) (higher)NDHAMBB-48-O1 of 1 models qualify · AHRI 217361790	16.4(50 is the typical model of its size class)OS-RMS42-230VO1 of 1 models qualify · AHRI 217739003

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 type	NAPOLEONAll-around score, best model	OLMOAll-around score, best model
Ducted, up to 1.5 tons	86.5(50 is the typical model of its size class)NDHAS26BA-09-Owith ducted air handler NDHASHDBB-098 of 8 models have all five ratings · AHRI 217361775	No models in this size class
Ducted, 2 tons	78.8(50 is the typical model of its size class)NDHAS22BA-24-Owith ducted air handler NDHASHDBB-244 of 4 models have all five ratings · AHRI 217605558	No models in this size class
Ducted, 2.5–3 tons	84.0(50 is the typical model of its size class)NDHAMB-36-O6 of 6 models have all five ratings · AHRI 215213726	No models in this size class
Ducted, 3.5–4.5 tons	83.9(50 is the typical model of its size class)NDHAMBB-48-O4 of 4 models have all five ratings · AHRI 217361789	No models in this size class
Non-ducted, up to 1.5 tons	96.2(50 is the typical model of its size class) (higher)NDHAS26BA-06-Owith ductless indoor unit NDHAS26BB-06-I7 of 7 models have all five ratings · AHRI 217361765	69.2(50 is the typical model of its size class)OS-RMS18-230VO6 of 6 models have all five ratings · AHRI 217739001
Non-ducted, 2 tons	76.8(50 is the typical model of its size class) (higher)NDHAS26BA-24-Owith ductless indoor unit NDHAS26BA-24-I2 of 2 models have all five ratings · AHRI 215931363	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
Non-ducted, 2.5–3 tons	78.3(50 is the typical model of its size class) (higher)NDHAMB-36-OAlso listed as NDHAMBB-36-O5 of 5 models have all five ratings · AHRI 215213725	64.2(50 is the typical model of its size class)OS-RMS27-230VO3 of 3 models have all five ratings · AHRI 217739002
Non-ducted, 3.5–4.5 tons	75.6(50 is the typical model of its size class) (higher)NDHAMBB-48-O1 of 1 models have all five ratings · AHRI 217361788	43.7(50 is the typical model of its size class)OS-RMS42-230VO1 of 1 models have all five ratings · AHRI 217739003

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
Rating	NAPOLEON	OLMO
COP at 5°F	beats 99% · 2.51NDHAS22BA-12-ONon-ducted, up to 1.5 tons	beats 100% · 2.53OS-SR18-230VONon-ducted, up to 1.5 tons
Capacity retention at 5°F	beats 100% · 132%WSEHV4860BA1-NDucted, 3.5–4.5 tons	beats 87% · 100%OS-RMS18-230VONon-ducted, up to 1.5 tons
HSPF2	beats 99% · 14.8NDHAS26BA-06-ONon-ducted, up to 1.5 tons	beats 64% · 10.0OS-RMS18-230VONon-ducted, up to 1.5 tons
SEER2	beats 96% · 20.4NDHAMBB-48-ODucted, 3.5–4.5 tons	beats 75% · 23.0OS-RMS27-230VONon-ducted, 2.5–3 tons
EER2	beats 99% · 18.0NDHAS26BA-06-ONon-ducted, up to 1.5 tons	beats 80% · 12.9OS-RMS27-230VONon-ducted, 2.5–3 tons
Heating capacity at 5°F	beats 97% · 19,000 Btu/hNDHAMBB-18-ONon-ducted, up to 1.5 tons	beats 93% · 18,000 Btu/hOS-RMS18-230VONon-ducted, up to 1.5 tons

More comparisons

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NAPOLEON vs OLMO heat pumps