A/H EDEN vs MSH LEGACY heat pumps

Measured against models of the same size and duct type, A/H EDEN scores higher on 4 of the 6 ratings. A/H EDEN has 7 outdoor models, MSH LEGACY has 7 outdoor models. A/H EDEN and MSH LEGACY have no QMID on file and are not ranked.

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CompareData as of Oct 9, 2026updated Oct 10, 2026 · 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.

A/H EDEN and MSH LEGACY 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, A/H EDEN scores higher on 4 of the 6 ratings.

A/H EDEN
MSH LEGACY
Other ranked manufacturers

Source: AHRI Directory, NEEP · as of Oct 9, 2026

Average peer percentile, raw median and rank among ranked manufacturers
Rating	A/H EDEN	MSH LEGACY
Efficiency index	34%median —	34%median —
COP at 5°F	43% (higher)median 1.90	25% (higher)median 1.80
Capacity retention at 5°F	31% (higher)median 73%	11% (higher)median 41%
HSPF2	45% (higher)median 9.5	24% (higher)median 7.2
SEER2	31%median 20.0	39%median 15.2
EER2	26%median 10.5	56%median 11.5
Heating capacity at 5°F	33% (higher)median 9,000 Btu/h	15% (higher)median 18,200 Btu/h
Outdoor models	7	7
AHRI certifications	7	7

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	A/H EDEN	MSH LEGACY
CEE 2025 Tier 1 (Split ASHP)	85.7%6 models	0%0 models
CEE 2026 Tier 1 (Split ASHP)	85.7%6 models	0%0 models
CEE Advanced Tier (Split ASHP)	0%0 models	0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)	57.1%4 models	0%0 models
DOE Cold Climate Heat Pump Challenge	0%0 models	0%0 models
ENERGY STAR Cold Climate	0%0 models	0%0 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 · 0 groups where both have models

A/H EDEN
MSH LEGACY
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 9, 2026

Models per peer group · efficiency index within the group
Size and duct type	A/H EDEN	MSH LEGACY
Ducted, 2 tons	None	1 · index 21%
Ducted, 2.5–3 tons	None	2 · index 27%
Ducted, 3.5–4.5 tons	None	4 · index 40%
Non-ducted, up to 1.5 tons	5 · index 35%	None
Non-ducted, 2 tons	1 · index 39%	None
Non-ducted, 2.5–3 tons	1 · index 23%	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 type	A/H EDENCold-climate score, best model	MSH LEGACYCold-climate score, best model
Ducted, 2 tons	No models in this size class	None on this board (0 of 1 models qualify)
Ducted, 2.5–3 tons	No models in this size class	None on this board (0 of 2 models qualify)
Ducted, 3.5–4.5 tons	No models in this size class	None on this board (0 of 4 models qualify)
Non-ducted, up to 1.5 tons	50.4(50 is the typical model of its size class)AS09HP2ACwith ductless indoor unit AS09HP2AE4 of 5 models qualify · AHRI 217513412	No models in this size class
Non-ducted, 2 tons	None on this board (0 of 1 models qualify)	No models in this size class
Non-ducted, 2.5–3 tons	None on this board (0 of 1 models qualify)	No 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 type	A/H EDENAll-around score, best model	MSH LEGACYAll-around score, best model
Ducted, 2 tons	No models in this size class	20.5(50 is the typical model of its size class)PHB524000K000B*1 of 1 models have all five ratings · AHRI 217154396
Ducted, 2.5–3 tons	No models in this size class	27.2(50 is the typical model of its size class)PHB536000H000B*2 of 2 models have all five ratings · AHRI 217154420
Ducted, 3.5–4.5 tons	No models in this size class	46.0(50 is the typical model of its size class)PHB560000H000B*4 of 4 models have all five ratings · AHRI 217154470
Non-ducted, up to 1.5 tons	43.9(50 is the typical model of its size class)AS09HP2ACwith ductless indoor unit AS09HP2AE5 of 5 models have all five ratings · AHRI 217513412	No models in this size class
Non-ducted, 2 tons	39.1(50 is the typical model of its size class)AS24HP2AC*with ductless indoor unit AS24HP2AE1 of 1 models have all five ratings · AHRI 217617212	No models in this size class
Non-ducted, 2.5–3 tons	23.4(50 is the typical model of its size class)AS36HP2AC*with ductless indoor unit AS36HP2AE1 of 1 models have all five ratings · AHRI 217617213	No 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
Rating	A/H EDEN	MSH LEGACY
COP at 5°F	beats 88% · 2.10AS36HP2AC*Non-ducted, 2.5–3 tons	beats 54% · 2.00PHB560000K000B*Ducted, 3.5–4.5 tons
Capacity retention at 5°F	beats 47% · 75%AS12HP1ACNon-ducted, up to 1.5 tons	beats 17% · 46%PHB560000H000B*Ducted, 3.5–4.5 tons
HSPF2	beats 64% · 10.0AS09HP2ACNon-ducted, up to 1.5 tons	beats 34% · 7.7PHB560000K000B*Ducted, 3.5–4.5 tons
SEER2	beats 47% · 21.0AS24HP2AC*Non-ducted, 2 tons	beats 42% · 15.5PHB560000K000B*Ducted, 3.5–4.5 tons
EER2	beats 44% · 12.0AS09HP2ACNon-ducted, up to 1.5 tons	beats 57% · 11.5PHB548000K000B*Ducted, 3.5–4.5 tons
Heating capacity at 5°F	beats 72% · 12,500 Btu/hAS18HP2ACNon-ducted, up to 1.5 tons	beats 27% · 25,800 Btu/hPHB560000K000B*Ducted, 3.5–4.5 tons

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