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.

KANIONco and Mitsutomo 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, Mitsutomo scores higher on 5 of the 6 ratings.

KANIONco
Mitsutomo
Other ranked manufacturers

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

Average peer percentile, raw median and rank among ranked manufacturers
Rating	KANIONco	Mitsutomo
Efficiency index	46%median —	59%median —
COP at 5°F	49% (higher)median 1.92	48% (higher)median 1.95
Capacity retention at 5°F	37%median 66%	72%median 88%
HSPF2	45%median 8.8	72%median 9.5
SEER2	48%median 19.0	60%median 20.0
EER2	38%median 10.3	50%median 11.7
Heating capacity at 5°F	37%median 11,600 Btu/h	68%median 22,600 Btu/h
Outdoor models	91	31
AHRI certifications	107	71

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	KANIONco	Mitsutomo
CEE 2025 Tier 1 (Split ASHP)	57.1%52 models	71%22 models
CEE 2026 Tier 1 (Split ASHP)	52.7%48 models	71%22 models
CEE Advanced Tier (Split ASHP)	0%0 models	3.2%1 models
Xcel Energy Colorado cold-climate ASHP (2025)	33%30 models	67.7%21 models
DOE Cold Climate Heat Pump Challenge	0%0 models	3.2%1 models
ENERGY STAR Cold Climate	17.6%16 models	77.4%24 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

KANIONco
Mitsutomo
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	KANIONco	Mitsutomo
Ducted, up to 1.5 tons	5 · index 64%	5 · index 65%
Ducted, 2 tons	1 · index 80%	2 · index 73%
Ducted, 2.5–3 tons	7 · index 59%	8 · index 66%
Ducted, 3.5–4.5 tons	4 · index 57%	6 · index 60%
Ducted, 5 tons and up	1 · index 57%	None
Non-ducted, up to 1.5 tons	53 · index 42%	10 · index 56%
Non-ducted, 2 tons	12 · index 38%	2 · index 47%
Non-ducted, 2.5–3 tons	14 · index 47%	9 · index 58%
Non-ducted, 3.5–4.5 tons	2 · index 48%	4 · index 51%

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	KANIONcoCold-climate score, best model	MitsutomoCold-climate score, best model
Ducted, up to 1.5 tons	74.9(50 is the typical model of its size class)KD-09IR410AHSODUwith ducted air handler KD-09IR410AHSIDU5 of 5 models qualify · AHRI 212615045	74.9(50 is the typical model of its size class)HO-SZ09-AB-Qwith ducted air handler HD-UZ09-AB-Q5 of 5 models qualify · AHRI 214056566
Ducted, 2 tons	79.4(50 is the typical model of its size class)KD-24IR410AHSODUwith ducted air handler KD-24IR410AHSIDU1 of 1 models qualify · AHRI 212615048	79.4(50 is the typical model of its size class)HO-SZ24-AB-Qwith ducted air handler HD-UZ24-AB-Q2 of 2 models qualify · AHRI 214056569
Ducted, 2.5–3 tons	57.4(50 is the typical model of its size class)KWSMO-30R410AIHMVAlso listed as KWSMO-27R410AIHH2 of 7 models qualify · AHRI 207691850	80.4(50 is the typical model of its size class) (higher)HO-MT28-AC-Q7 of 8 models qualify · AHRI 213785766
Ducted, 3.5–4.5 tons	None on this board (0 of 4 models qualify)	86.4(50 is the typical model of its size class)HO-SZ48-BB-Qwith ducted air handler HD-UZ48-BB-Q6 of 6 models qualify · AHRI 214056577
Ducted, 5 tons and up	None on this board (0 of 1 models qualify)	No models in this size class
Non-ducted, up to 1.5 tons	89.3(50 is the typical model of its size class) (higher)KWSM-06IR410AHS26.5ODUwith ductless indoor unit KWSM-06IR410AHS26.5IDU22 of 53 models qualify · AHRI 213160460	82.4(50 is the typical model of its size class)HO-SZ06-AB-Qwith ductless indoor unit HJ-UZ06-AB-Q7 of 10 models qualify · AHRI 211306397
Non-ducted, 2 tons	84.5(50 is the typical model of its size class)KWSM-24IR410AHS21.5ODUwith ductless indoor unit KWSM-24IR410AHS21.5IDU1 of 12 models qualify · AHRI 213160464	86.1(50 is the typical model of its size class) (higher)HO-SZ24-AB-Qwith ductless indoor unit HC-UZ24-AB-Q1 of 2 models qualify · AHRI 214056565
Non-ducted, 2.5–3 tons	49.3(50 is the typical model of its size class)KWSMO-30R410AIHMVAlso listed as KWSMO-27R410AIHH2 of 14 models qualify · AHRI 207691849	87.0(50 is the typical model of its size class) (higher)HO-MQ36-AC-Q6 of 9 models qualify · AHRI 213785768
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)HO-MP48-AB-Q4 of 4 models qualify · AHRI 211306410

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	KANIONcoAll-around score, best model	MitsutomoAll-around score, best model
Ducted, up to 1.5 tons	85.2(50 is the typical model of its size class)KD-09IR410AHSODUwith ducted air handler KD-09IR410AHSIDU5 of 5 models have all five ratings · AHRI 212615045	85.2(50 is the typical model of its size class)HO-SZ09-AB-Qwith ducted air handler HD-UZ09-AB-Q5 of 5 models have all five ratings · AHRI 214056566
Ducted, 2 tons	80.1(50 is the typical model of its size class)KD-24IR410AHSODUwith ducted air handler KD-24IR410AHSIDU1 of 1 models have all five ratings · AHRI 212615048	80.1(50 is the typical model of its size class)HO-SZ24-AB-Qwith ducted air handler HD-UZ24-AB-Q2 of 2 models have all five ratings · AHRI 214056569
Ducted, 2.5–3 tons	71.5(50 is the typical model of its size class)KWSMO-30R410AIHMVAlso listed as KWSMO-27R410AIHH5 of 7 models have all five ratings · AHRI 207691850	83.7(50 is the typical model of its size class) (higher)HO-MQ36-AC-Q8 of 8 models have all five ratings · AHRI 213785769
Ducted, 3.5–4.5 tons	63.5(50 is the typical model of its size class)KWSMO-48R410AIHMVAlso listed as KWSMO-48R410AIHH3 of 4 models have all five ratings · AHRI 207691853	82.0(50 is the typical model of its size class) (higher)HO-MP48-AB-Q6 of 6 models have all five ratings · AHRI 211306411
Ducted, 5 tons and up	57.1(50 is the typical model of its size class)KD-60IR410AHSODUwith ducted air handler KD-60IR410AHSIDU1 of 1 models have all five ratings · AHRI 212615044	No models in this size class
Non-ducted, up to 1.5 tons	92.0(50 is the typical model of its size class) (higher)KWSM-06IR410AHS26.5ODUwith ductless indoor unit KWSM-06IR410AHS26.5IDU48 of 53 models have all five ratings · AHRI 213160460	84.4(50 is the typical model of its size class)HO-SZ09-AB-Qwith ductless indoor unit HW-SZ09-AB-Q10 of 10 models have all five ratings · AHRI 211306393
Non-ducted, 2 tons	84.3(50 is the typical model of its size class) (higher)KWSM-24IR410AHS21.5ODUwith ductless indoor unit KWSM-24IR410AHS21.5IDU11 of 12 models have all five ratings · AHRI 213160464	70.7(50 is the typical model of its size class)HO-SZ24-AB-Qwith ductless indoor unit HW-SZ24-AB-Q2 of 2 models have all five ratings · AHRI 211306396
Non-ducted, 2.5–3 tons	66.7(50 is the typical model of its size class)KWSMO-30R410AIHMVAlso listed as KWSMO-27R410AIHH11 of 14 models have all five ratings · AHRI 207691849	76.8(50 is the typical model of its size class) (higher)HO-MQ36-AC-Q9 of 9 models have all five ratings · AHRI 213785768
Non-ducted, 3.5–4.5 tons	48.3(50 is the typical model of its size class)KWSMO-48R410AIHMVAlso listed as KWSMO-48R410AIHH2 of 2 models have all five ratings · AHRI 207691852	73.8(50 is the typical model of its size class) (higher)HO-MP48-AB-Q4 of 4 models have all five ratings · AHRI 211306410

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	KANIONco	Mitsutomo
COP at 5°F	beats 98% · 2.27KWSMO-27IR410AHSPNon-ducted, 2 tons	beats 87% · 2.01RO-SZ36-AB-QAlso listed as RO-SZ36-AC-QNon-ducted, 2.5–3 tons
Capacity retention at 5°F	beats 93% · 108%KD-09IR410AHSODUDucted, up to 1.5 tons	beats 96% · 101%HO-MT28-AC-QDucted, 2.5–3 tons
HSPF2	beats 98% · 13.6KWSM-06IR410AHS26.5ODUNon-ducted, up to 1.5 tons	beats 99% · 10.3HO-SZ48-BB-QDucted, 3.5–4.5 tons
SEER2	beats 98% · 28.1KWSM-09IR410AHS28.1ODUNon-ducted, up to 1.5 tons	beats 99% · 20.9HO-MP48-AB-QDucted, 3.5–4.5 tons
EER2	beats 98% · 16.2KWSM-09IR410AHS28.1ODUNon-ducted, up to 1.5 tons	beats 95% · 15.8HO-SZ09-AB-QNon-ducted, up to 1.5 tons
Heating capacity at 5°F	beats 93% · 27,000 Btu/hKD-24IR410AHSODUDucted, 2 tons	beats 99% · 56,500 Btu/hHW-SZ60-BB-QNon-ducted, 3.5–4.5 tons

More comparisons

Pick any two manufacturers

KANIONco vs Mitsutomo heat pumps