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 Senville 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, Senville scores higher on 5 of the 6 ratings.

HITACHI
Senville
Other ranked manufacturers

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

Average peer percentile, raw median and rank among ranked manufacturers
Rating	HITACHI	Senville
Efficiency index	58%median —	61%median — · 7th ranked
COP at 5°F	72% (higher)median 2.25	44% (higher)median 1.91 · 22nd ranked
Capacity retention at 5°F	57%median 76%	60%median 82% · 7th ranked
HSPF2	65%median 9.8	67%median 9.5 · 6th ranked
SEER2	50%median 20.0	67%median 21.4 · 3rd ranked
EER2	53%median 12.5	56%median 11.7 · 11th ranked
Heating capacity at 5°F	49%median 14,500 Btu/h	58%median 20,000 Btu/h · 7th ranked
Outdoor models	27	27
AHRI certifications	47	59

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	HITACHI	Senville
CEE 2025 Tier 1 (Split ASHP)	74.1%20 models	70.4%19 models
CEE 2026 Tier 1 (Split ASHP)	74.1%20 models	63%17 models
CEE Advanced Tier (Split ASHP)	0%0 models	3.7%1 models
Xcel Energy Colorado cold-climate ASHP (2025)	66.7%18 models	44.4%12 models
DOE Cold Climate Heat Pump Challenge	0%0 models	3.7%1 models
ENERGY STAR Cold Climate	14.8%4 models	51.9%14 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
Senville
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	Senville
Ducted, up to 1.5 tons	4 · index 50%	5 · index 63%
Ducted, 2 tons	2 · index 56%	2 · index 73%
Ducted, 2.5–3 tons	3 · index 71%	5 · index 69%
Ducted, 3.5–4.5 tons	3 · index 66%	4 · index 63%
Non-ducted, up to 1.5 tons	15 · index 57%	10 · index 54%
Non-ducted, 2 tons	5 · index 57%	2 · index 50%
Non-ducted, 2.5–3 tons	4 · index 52%	9 · index 60%
Non-ducted, 3.5–4.5 tons	2 · index 60%	2 · index 67%
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	SenvilleCold-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	74.9(50 is the typical model of its size class) (higher)SENA/09HF/OQwith ducted air handler SENA/09HF/ID5 of 5 models qualify · AHRI 207641345
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)SENA/24HF/OQwith ducted air handler SENA/24HF/ID2 of 2 models qualify · AHRI 207641348
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	79.9(50 is the typical model of its size class) (higher)SENA-36HF-MOB3 of 5 models qualify · AHRI 213732657
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)SENA-48HF-MOB3 of 4 models qualify · AHRI 213732660
Non-ducted, up to 1.5 tons	81.1(50 is the typical model of its size class) (higher)RAC-SH09WHLAEwith ductless indoor unit RAS-SH09RHLAE13 of 15 models qualify · AHRI 206907172	77.5(50 is the typical model of its size class)SENA/12HF/OQwith ductless indoor unit SENA/12HF/IQ4 of 10 models qualify · AHRI 207571419
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)SENA/24HF/OQwith ductless indoor unit SENA/24HF/ICQ1 of 2 models qualify · AHRI 207641344
Non-ducted, 2.5–3 tons	77.2(50 is the typical model of its size class)RAS-4.0PNNBDH1with ductless indoor unit RCI-4.0PNN1DH3 of 4 models qualify · AHRI 206750859	90.9(50 is the typical model of its size class) (higher)SENA-36HF-MOB3 of 9 models qualify · AHRI 213732656
Non-ducted, 3.5–4.5 tons	None on this board (0 of 2 models qualify)	76.2(50 is the typical model of its size class)SENA-48HF-MOB1 of 2 models qualify · AHRI 213732659
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	SenvilleAll-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)SENA/09HF/OQwith ducted air handler SENA/09HF/ID5 of 5 models have all five ratings · AHRI 207641345
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)SENA/24HF/OQwith ducted air handler SENA/24HF/ID2 of 2 models have all five ratings · AHRI 207641348
Ducted, 2.5–3 tons	74.3(50 is the typical model of its size class)HVAHP036B21S*2 of 3 models have all five ratings · AHRI 203994975	83.7(50 is the typical model of its size class) (higher)SENA-36HF-MOB5 of 5 models have all five ratings · AHRI 213732657
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)SENA-48HF-MOB4 of 4 models have all five ratings · AHRI 213732660
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	87.6(50 is the typical model of its size class) (higher)SENA/09HF/OQwith ductless indoor unit SENA/09HF/IQ10 of 10 models have all five ratings · AHRI 207571418
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)SENA/24HF/OQwith ductless indoor unit SENA/24HF/IQ2 of 2 models have all five ratings · AHRI 207657630
Non-ducted, 2.5–3 tons	74.6(50 is the typical model of its size class)HVAHP036B21S*3 of 4 models have all five ratings · AHRI 203994969	86.4(50 is the typical model of its size class) (higher)SENA-36HF-MOB7 of 9 models have all five ratings · AHRI 213732656
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	77.9(50 is the typical model of its size class) (higher)SENA-48HF-MOB2 of 2 models have all five ratings · AHRI 213732659
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	Senville
COP at 5°F	beats 99% · 2.30RAC-EH24WHLAENon-ducted, 2 tons	beats 91% · 2.21SENA/24HF/OQNon-ducted, 2 tons
Capacity retention at 5°F	beats 99% · 133%RAC-PH09WHLAENon-ducted, up to 1.5 tons	beats 97% · 103%SENA-36HF-MOBNon-ducted, 2.5–3 tons
HSPF2	beats 98% · 10.0HVAHP048B21S*Ducted, 3.5–4.5 tons	beats 98% · 12.0SENA/09HF/OQDucted, up to 1.5 tons
SEER2	beats 93% · 23.1HVAHP048B21S*Non-ducted, 3.5–4.5 tons	beats 99% · 24.6SENA/30HF/MOQNon-ducted, 2.5–3 tons
EER2	beats 100% · 16.7HVAHP048B21S*Non-ducted, 3.5–4.5 tons	beats 98% · 16.2SENA/09HF/OQNon-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 96% · 20,000 Btu/hSENA-18HF-MOBNon-ducted, up to 1.5 tons

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HITACHI vs Senville heat pumps