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.

HITACHI and LPS 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, HITACHI scores higher on 4 of the 6 ratings.

HITACHI
LPS Legacy
Other ranked manufacturers

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

Average peer percentile, raw median and rank among ranked manufacturers
Rating	HITACHI	LPS Legacy
Efficiency index	58% (higher)median —	53% (higher)median —
COP at 5°F	72% (higher)median 2.25	51% (higher)median 1.97
Capacity retention at 5°F	57% (higher)median 76%	49% (higher)median 67%
HSPF2	65% (higher)median 9.8	62% (higher)median 9.2
SEER2	50%median 20.0	55%median 18.5
EER2	53% (higher)median 12.5	42% (higher)median 10.6
Heating capacity at 5°F	49%median 14,500 Btu/h	50%median 19,000 Btu/h
Outdoor models	27	58
AHRI certifications	47	146

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	HITACHI	LPS Legacy
CEE 2025 Tier 1 (Split ASHP)	74.1%20 models	58.6%34 models
CEE 2026 Tier 1 (Split ASHP)	74.1%20 models	55.2%32 models
CEE Advanced Tier (Split ASHP)	0%0 models	3.4%2 models
Xcel Energy Colorado cold-climate ASHP (2025)	66.7%18 models	39.7%23 models
DOE Cold Climate Heat Pump Challenge	0%0 models	3.4%2 models
ENERGY STAR Cold Climate	14.8%4 models	43.1%25 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 · 8 groups where both have models

HITACHI
LPS 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 11, 2026

Models per peer group · efficiency index within the group
Size and duct type	HITACHI	LPS Legacy
Ducted, up to 1.5 tons	4 · index 50%	6 · index 61%
Ducted, 2 tons	2 · index 56%	4 · index 65%
Ducted, 2.5–3 tons	3 · index 71%	13 · index 53%
Ducted, 3.5–4.5 tons	3 · index 66%	8 · index 54%
Ducted, 5 tons and up	None	3 · index 51%
Non-ducted, up to 1.5 tons	15 · index 57%	20 · index 53%
Non-ducted, 2 tons	5 · index 57%	4 · index 47%
Non-ducted, 2.5–3 tons	4 · index 52%	13 · index 47%
Non-ducted, 3.5–4.5 tons	2 · index 60%	7 · index 46%
Non-ducted, 5 tons and up	1 · index 69%	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	HITACHICold-climate score, best model	LPS LegacyCold-climate score, best model
Ducted, up to 1.5 tons	55.9(50 is the typical model of its size class)RAS-1.0PNNBDH1with ducted air handler RPIL-1.0PNN1DH2 of 4 models qualify · AHRI 206750852	81.3(50 is the typical model of its size class) (higher)DLCSRBH18AAKwith ducted air handler DLFSDAH18XHK5 of 6 models qualify · AHRI 211756586
Ducted, 2 tons	64.8(50 is the typical model of its size class)RAS-3.0PNNBDH1with ducted air handler RPIM-3.0PNN1DH1 of 2 models qualify · AHRI 206750858	79.4(50 is the typical model of its size class) (higher)DLCSRBH24AAKwith ducted air handler DLFSDAH24XAK4 of 4 models qualify · AHRI 211756579
Ducted, 2.5–3 tons	78.1(50 is the typical model of its size class)RAS-4.0PNNBDH1with ducted air handler RPIM-4.0PNN1DH2 of 3 models qualify · AHRI 206750860	78.6(50 is the typical model of its size class) (higher)DLCURAH36ABKwith ducted air handler DLFULAH36XCX + CI3 of 13 models qualify · AHRI 213372201
Ducted, 3.5–4.5 tons	None on this board (0 of 3 models qualify)	74.9(50 is the typical model of its size class)DLCURAH48ABKwith ducted air handler DLFUAAH60XAK4 of 8 models qualify · AHRI 217197708
Ducted, 5 tons and up	No models in this size class	None on this board (0 of 3 models qualify)
Non-ducted, up to 1.5 tons	81.1(50 is the typical model of its size class)RAC-SH09WHLAEwith ductless indoor unit RAS-SH09RHLAE13 of 15 models qualify · AHRI 206907172	95.0(50 is the typical model of its size class) (higher)DLCPRBH18AAKwith ductless indoor unit DLFPHBH18XAK11 of 20 models qualify · AHRI 211756581
Non-ducted, 2 tons	76.3(50 is the typical model of its size class)RAC-PH24WHLAEwith ductless indoor unit RAS-PH24PHLAE3 of 5 models qualify · AHRI 207200483	86.1(50 is the typical model of its size class) (higher)DLCSRBH24AAKwith ductless indoor unit DLFSCBH24XAK2 of 4 models qualify · AHRI 211756560
Non-ducted, 2.5–3 tons	77.2(50 is the typical model of its size class) (higher)RAS-4.0PNNBDH1with ductless indoor unit RCI-4.0PNN1DH3 of 4 models qualify · AHRI 206750859	73.4(50 is the typical model of its size class)DLCMHBH36DAK2 of 13 models qualify · AHRI 211756577
Non-ducted, 3.5–4.5 tons	None on this board (0 of 2 models qualify)	80.5(50 is the typical model of its size class)DLCMHBH48EAK3 of 7 models qualify · AHRI 211756575
Non-ducted, 5 tons and up	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	HITACHIAll-around score, best model	LPS LegacyAll-around score, best model
Ducted, up to 1.5 tons	57.7(50 is the typical model of its size class)RAS-1.0PNNBDH1with ducted air handler RPIL-1.0PNN1DH3 of 4 models have all five ratings · AHRI 206750852	85.2(50 is the typical model of its size class) (higher)DLCSRBH09AAKwith ducted air handler DLFSDAH09XAK6 of 6 models have all five ratings · AHRI 211756568
Ducted, 2 tons	55.8(50 is the typical model of its size class)RAS-3.0PNNBDH1with ducted air handler RPIM-3.0PNN1DH1 of 2 models have all five ratings · AHRI 206750858	80.1(50 is the typical model of its size class) (higher)DLCSRBH24AAKwith ducted air handler DLFSDAH24XAK4 of 4 models have all five ratings · AHRI 211756579
Ducted, 2.5–3 tons	74.3(50 is the typical model of its size class) (higher)HVAHP036B21S*2 of 3 models have all five ratings · AHRI 203994975	72.0(50 is the typical model of its size class)DLCMHBH30DAK12 of 13 models have all five ratings · AHRI 211756500
Ducted, 3.5–4.5 tons	77.8(50 is the typical model of its size class)HVAHP048B21S*2 of 3 models have all five ratings · AHRI 203994976	82.0(50 is the typical model of its size class) (higher)DLCMHBH48EAK7 of 8 models have all five ratings · AHRI 211756576
Ducted, 5 tons and up	No models in this size class	57.1(50 is the typical model of its size class)DLCLRCH58AAKwith ducted air handler DLFLDAH58XHK3 of 3 models have all five ratings · AHRI 211756477
Non-ducted, up to 1.5 tons	72.1(50 is the typical model of its size class)RAC-SH09WHLAEwith ductless indoor unit RAS-SH09RHLAE14 of 15 models have all five ratings · AHRI 206907172	93.6(50 is the typical model of its size class) (higher)DLCPRBH18AAKwith ductless indoor unit DLFPHBH18XAK20 of 20 models have all five ratings · AHRI 211756581
Non-ducted, 2 tons	73.1(50 is the typical model of its size class)RAC-PH24WHLAEwith ductless indoor unit RAS-PH24PHLAE4 of 5 models have all five ratings · AHRI 207200483	84.3(50 is the typical model of its size class) (higher)DLCSRBH24AAKwith ductless indoor unit DLFSHCH24XAK4 of 4 models have all five ratings · AHRI 211756584
Non-ducted, 2.5–3 tons	74.6(50 is the typical model of its size class) (higher)HVAHP036B21S*3 of 4 models have all five ratings · AHRI 203994969	70.8(50 is the typical model of its size class)DLCMHBH36DAK11 of 13 models have all five ratings · AHRI 211756577
Non-ducted, 3.5–4.5 tons	67.0(50 is the typical model of its size class)HVAHP048B21S*1 of 2 models have all five ratings · AHRI 203994970	73.8(50 is the typical model of its size class) (higher)DLCMHBH48EAK5 of 7 models have all five ratings · AHRI 211756575
Non-ducted, 5 tons and up	68.5(50 is the typical model of its size class)HVAHP060B21S*1 of 1 models have all five ratings · AHRI 203994965	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	HITACHI	LPS Legacy
COP at 5°F	beats 99% · 2.30RAC-EH24WHLAENon-ducted, 2 tons	beats 99% · 2.89DLCPRBH18AAKNon-ducted, up to 1.5 tons
Capacity retention at 5°F	beats 99% · 133%RAC-PH09WHLAENon-ducted, up to 1.5 tons	beats 97% · 120%DLCPRBH18AAKNon-ducted, up to 1.5 tons
HSPF2	beats 98% · 10.0HVAHP048B21S*Ducted, 3.5–4.5 tons	beats 100% · 15.0DLCPRBH09AAKNon-ducted, up to 1.5 tons
SEER2	beats 93% · 23.1HVAHP048B21S*Non-ducted, 3.5–4.5 tons	beats 99% · 20.9DLCMHBH48EAKDucted, 3.5–4.5 tons
EER2	beats 100% · 16.7HVAHP048B21S*Non-ducted, 3.5–4.5 tons	beats 98% · 16.2DLCSRBH09AAKNon-ducted, up to 1.5 tons
Heating capacity at 5°F	beats 99% · 23,000 Btu/hRAC-PH18WHLAENon-ducted, up to 1.5 tons	beats 100% · 24,000 Btu/hDLCPRBH18AAKNon-ducted, up to 1.5 tons

More comparisons

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HITACHI vs LPS Legacy heat pumps