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.

ACIQ and Mitsubishi Electric 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, Mitsubishi Electric scores higher on 5 of the 6 ratings.

ACIQ
Mitsubishi Electric
Other ranked manufacturers

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

Average peer percentile, raw median and rank among ranked manufacturers
Rating	ACIQ	Mitsubishi Electric
Efficiency index	50%median —	60%median — · 6th ranked
COP at 5°F	55%median 2.00	55%median 2.00 · 18th ranked
Capacity retention at 5°F	43%median 69%	54%median 71% · 13th ranked
HSPF2	52%median 8.5	66%median 10.0 · 6th ranked
SEER2	49%median 17.0	63%median 20.0 · 4th ranked
EER2	52%median 11.2	60%median 12.5 · 7th ranked
Heating capacity at 5°F	46%median 19,600 Btu/h	63%median 20,500 Btu/h · 6th ranked
Outdoor models	175	156
AHRI certifications	18,053	523

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	ACIQ	Mitsubishi Electric
CEE 2025 Tier 1 (Split ASHP)	55.4%97 models	80.8%126 models
CEE 2026 Tier 1 (Split ASHP)	53.1%93 models	80.8%126 models
CEE Advanced Tier (Split ASHP)	1.7%3 models	9.6%15 models
Xcel Energy Colorado cold-climate ASHP (2025)	46.3%81 models	66.7%104 models
DOE Cold Climate Heat Pump Challenge	1.7%3 models	9.6%15 models
ENERGY STAR Cold Climate	33.7%59 models	66%103 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 · 10 groups where both have models

ACIQ
Mitsubishi Electric
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	ACIQ	Mitsubishi Electric
Ducted, up to 1.5 tons	16 · index 64%	25 · index 62%
Ducted, 2 tons	24 · index 47%	10 · index 61%
Ducted, 2.5–3 tons	36 · index 49%	29 · index 62%
Ducted, 3.5–4.5 tons	57 · index 48%	29 · index 56%
Ducted, 5 tons and up	7 · index 65%	10 · index 54%
Non-ducted, up to 1.5 tons	30 · index 49%	60 · index 64%
Non-ducted, 2 tons	7 · index 50%	13 · index 61%
Non-ducted, 2.5–3 tons	13 · index 47%	21 · index 60%
Non-ducted, 3.5–4.5 tons	5 · index 52%	18 · index 54%
Non-ducted, 5 tons and up	1 · index 59%	6 · index 67%

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	ACIQCold-climate score, best model	Mitsubishi ElectricCold-climate score, best model
Ducted, up to 1.5 tons	86.6(50 is the typical model of its size class) (higher)ACIQ-18-HPDwith ducted air handler ACIQ-18W-WMB11 of 16 models qualify · AHRI 216980785	85.6(50 is the typical model of its size class)SUZ-AA15NLHZ***with ducted air handler PEAD-AA15NL10 of 24 models qualify · AHRI 215734918
Ducted, 2 tons	85.7(50 is the typical model of its size class) (higher)ACIQ-24ZPL-HP230Cwith ducted air handler ACIQ-24CD-HH-MC13 of 24 models qualify · AHRI 216032347	78.7(50 is the typical model of its size class)PUZ-AK24NLHZ2***with ducted air handler PVA-AA24NL8 of 10 models qualify · AHRI 218697028
Ducted, 2.5–3 tons	83.2(50 is the typical model of its size class)ACIQ-36ZPL-HP230Cwith ducted air handler ACIQ-36CD-HH-MC16 of 36 models qualify · AHRI 216032348	88.7(50 is the typical model of its size class) (higher)PUZ-AK30NLHZ2***with ducted air handler PVA-AA30NL20 of 30 models qualify · AHRI 218697041
Ducted, 3.5–4.5 tons	85.1(50 is the typical model of its size class) (higher)ACIQ-60-HP32with ducted air handler ACIQ-60-AH3226 of 53 models qualify · AHRI 215387241	80.2(50 is the typical model of its size class)MXZ-SM48NLHZ-**18 of 29 models qualify · AHRI 217135880
Ducted, 5 tons and up	82.3(50 is the typical model of its size class) (higher)B5H3V60KAAAwith ducted air handler FCMA5B60L0D+WALLCON5 of 11 models qualify · AHRI 218628756	78.1(50 is the typical model of its size class)MXZ-SM60NLHZ-**6 of 10 models qualify · AHRI 217643004
Non-ducted, up to 1.5 tons	96.7(50 is the typical model of its size class)ACIQ-06ZPL-HP230Cwith ductless indoor unit ACIQ-06W-HH-MD20 of 30 models qualify · AHRI 216032333	97.5(50 is the typical model of its size class) (higher)MUZ-FX06NLHZ***with ductless indoor unit MSZ-FX06NLAlso listed as MUZ-FX06NLHZ243 of 60 models qualify · AHRI 215611124
Non-ducted, 2 tons	89.4(50 is the typical model of its size class) (higher)ACIQ-24ZPL-HP230Cwith ductless indoor unit ACIQ-24CC-HH-MC4 of 7 models qualify · AHRI 216032341	88.4(50 is the typical model of its size class)PUZ-AK24NLHZ2***with ductless indoor unit PLA-AE24NL10 of 13 models qualify · AHRI 218697024
Non-ducted, 2.5–3 tons	89.4(50 is the typical model of its size class)ACIQ-36ZPL-HP230Cwith ductless indoor unit ACIQ-36FM-HH-MD8 of 13 models qualify · AHRI 216032355	93.8(50 is the typical model of its size class) (higher)PUZ-AK30NLHZ2***with ductless indoor unit PLA-AE30NL12 of 21 models qualify · AHRI 218697037
Non-ducted, 3.5–4.5 tons	73.4(50 is the typical model of its size class)ACIQ-48Z-HH-M6C5 of 5 models qualify · AHRI 216032372	78.4(50 is the typical model of its size class) (higher)MXZ-SM48NLHZ***Also listed as PUMY-HL48NKMU, MXZ-SM48NLHZ-13 of 18 models qualify · AHRI 215685467
Non-ducted, 5 tons and up	None on this board (0 of 1 models qualify)	70.0(50 is the typical model of its size class)MXZ-SM60NLHZ-**Also listed as PUMY-HL60NKMU6 of 6 models qualify · AHRI 217643003

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	ACIQAll-around score, best model	Mitsubishi ElectricAll-around score, best model
Ducted, up to 1.5 tons	86.5(50 is the typical model of its size class) (higher)ACIQ-09ZPL-HP230Cwith ducted air handler ACIQ-09CD-HH-MC16 of 16 models have all five ratings · AHRI 216032344	78.3(50 is the typical model of its size class)SUZ-AA15NLHZ***with ducted air handler PEAD-AA15NL21 of 22 models have all five ratings · AHRI 215734918
Ducted, 2 tons	82.9(50 is the typical model of its size class)B5H3V24KAAAwith ducted air handler FCMA5B36L0C+WALLCON22 of 22 models have all five ratings · AHRI 218628751	85.1(50 is the typical model of its size class) (higher)PUZ-AK24NLHZ2***with ducted air handler PVA-AA24NL12 of 12 models have all five ratings · AHRI 218697028
Ducted, 2.5–3 tons	85.1(50 is the typical model of its size class)H5H3V36KAAAwith ducted air handler FCMA5B60L0D+WALLCON37 of 37 models have all five ratings · AHRI 216635478	93.9(50 is the typical model of its size class) (higher)PUZ-AK30NLHZ2***with ducted air handler PVA-AA30NL30 of 30 models have all five ratings · AHRI 218697041
Ducted, 3.5–4.5 tons	85.1(50 is the typical model of its size class) (higher)ES-48Z-M6C53 of 53 models have all five ratings · AHRI 216032386	70.4(50 is the typical model of its size class)MXZ-SM48NLHZ-**29 of 29 models have all five ratings · AHRI 217135880
Ducted, 5 tons and up	89.1(50 is the typical model of its size class) (higher)B5H3V60KAAAwith ducted air handler FCMA5B60L0D+WALLCON12 of 12 models have all five ratings · AHRI 218628756	65.4(50 is the typical model of its size class)MXZ-SM60NLHZ-**10 of 10 models have all five ratings · AHRI 217643004
Non-ducted, up to 1.5 tons	96.2(50 is the typical model of its size class)ACIQ-06ZPL-HP230Cwith ductless indoor unit ACIQ-06W-HH-MD30 of 30 models have all five ratings · AHRI 216032333	98.7(50 is the typical model of its size class) (higher)MUZ-FX06NLHZ***with ductless indoor unit MSZ-FX06NLAlso listed as MUZ-FX06NLHZ256 of 60 models have all five ratings · AHRI 215611124
Non-ducted, 2 tons	86.8(50 is the typical model of its size class)ACIQ-24ZS-HP230Cwith ductless indoor unit ACIQ-24W-HH-MD7 of 7 models have all five ratings · AHRI 218471560	87.9(50 is the typical model of its size class) (higher)PUZ-AK24NLHZ2***with ductless indoor unit PLA-AE24NL12 of 13 models have all five ratings · AHRI 218697024
Non-ducted, 2.5–3 tons	78.3(50 is the typical model of its size class)ACIQ-36Z-HH-M5C13 of 13 models have all five ratings · AHRI 216032367	92.8(50 is the typical model of its size class) (higher)PUZ-AK30NLHZ2***with ductless indoor unit PLA-AE30NL20 of 21 models have all five ratings · AHRI 218697037
Non-ducted, 3.5–4.5 tons	75.6(50 is the typical model of its size class)ACIQ-48Z-HH-M6C5 of 5 models have all five ratings · AHRI 216032370	85.9(50 is the typical model of its size class) (higher)MXZ-SM48NLHZ***Also listed as PUMY-HL48NKMU, MXZ-SM48NLHZ-18 of 18 models have all five ratings · AHRI 215685467
Non-ducted, 5 tons and up	58.6(50 is the typical model of its size class)ES-55Z-M6C1 of 1 models have all five ratings · AHRI 216032388	68.7(50 is the typical model of its size class) (higher)MXZ-SM60NLHZ-**Also listed as PUMY-HL60NKMU6 of 6 models have all five ratings · AHRI 217643003

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	ACIQ	Mitsubishi Electric
COP at 5°F	beats 99% · 2.93ACIQ-18-HPDDucted, up to 1.5 tons	beats 100% · 2.70PUZ-AK42NL***Non-ducted, 3.5–4.5 tons
Capacity retention at 5°F	beats 98% · 126%ACIQ-09ZPL-HP230CNon-ducted, up to 1.5 tons	beats 99% · 140%MUZ-FX06NLHZ***Also listed as MUZ-FX06NLHZ2Non-ducted, up to 1.5 tons
HSPF2	beats 99% · 14.8ACIQ-06ZPL-HP230CNon-ducted, up to 1.5 tons	beats 100% · 12.0MXZ-SM36NLHZ***Also listed as PUMY-HL36NKMU, MXZ-SM36NLHZ-Non-ducted, 2.5–3 tons
SEER2	beats 100% · 23.0H5H3V48KAAAAlso listed as B5H3V48K*AAADucted, 3.5–4.5 tons	beats 100% · 35.0MUZ-FX06NLHZ***Also listed as MUZ-FX06NLHZ2Non-ducted, up to 1.5 tons
EER2	beats 99% · 18.0ACIQ-06ZPL-HP230CNon-ducted, up to 1.5 tons	beats 100% · 21.5MUZ-FX06NLHZ***Also listed as MUZ-FX06NLHZ2Non-ducted, up to 1.5 tons
Heating capacity at 5°F	beats 98% · 19,600 Btu/hACIQ-18-HPDDucted, up to 1.5 tons	beats 100% · 26,600 Btu/hMUZ-FX24NLHZ***Also listed as MUZ-FX24NLHZ2Non-ducted, up to 1.5 tons

More comparisons

Pick any two manufacturers

ACIQ vs Mitsubishi Electric heat pumps