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.

Mitsubishi Electric and Rheem 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.

Mitsubishi Electric
Rheem
Other ranked manufacturers

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

Average peer percentile, raw median and rank among ranked manufacturers
Rating	Mitsubishi Electric	Rheem
Efficiency index	60% (higher)median — · 6th ranked	49% (higher)median — · 21st ranked
COP at 5°F	55%median 2.00 · 18th ranked	59%median 2.08 · 10th ranked
Capacity retention at 5°F	54% (higher)median 71% · 13th ranked	48% (higher)median 66% · 18th ranked
HSPF2	66% (higher)median 10.0 · 6th ranked	43% (higher)median 7.5 · 23rd ranked
SEER2	63% (higher)median 20.0 · 4th ranked	42% (higher)median 15.2 · 23rd ranked
EER2	60% (higher)median 12.5 · 7th ranked	40% (higher)median 10.6 · 25th ranked
Heating capacity at 5°F	63% (higher)median 20,500 Btu/h · 6th ranked	49% (higher)median 19,600 Btu/h · 18th ranked
Outdoor models	156	341
AHRI certifications	523	25,744

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	Mitsubishi Electric	Rheem
CEE 2025 Tier 1 (Split ASHP)	80.8%126 models	35.5%121 models
CEE 2026 Tier 1 (Split ASHP)	80.8%126 models	33.7%115 models
CEE Advanced Tier (Split ASHP)	9.6%15 models	1.8%6 models
Xcel Energy Colorado cold-climate ASHP (2025)	66.7%104 models	33.7%115 models
DOE Cold Climate Heat Pump Challenge	9.6%15 models	1.8%6 models
ENERGY STAR Cold Climate	66%103 models	33.4%114 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

Mitsubishi Electric
Rheem
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	Mitsubishi Electric	Rheem
Ducted, up to 1.5 tons	25 · index 62%	33 · index 55%
Ducted, 2 tons	10 · index 61%	35 · index 42%
Ducted, 2.5–3 tons	29 · index 62%	90 · index 46%
Ducted, 3.5–4.5 tons	29 · index 56%	121 · index 49%
Ducted, 5 tons and up	10 · index 54%	31 · index 43%
Non-ducted, up to 1.5 tons	60 · index 64%	38 · index 58%
Non-ducted, 2 tons	13 · index 61%	9 · index 53%
Non-ducted, 2.5–3 tons	21 · index 60%	18 · index 54%
Non-ducted, 3.5–4.5 tons	18 · index 54%	12 · index 49%
Non-ducted, 5 tons and up	6 · index 67%	2 · index 43%

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	Mitsubishi ElectricCold-climate score, best model	RheemCold-climate score, best model
Ducted, up to 1.5 tons	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	93.5(50 is the typical model of its size class) (higher)ML06HP230NEXH-Owith ducted air handler ML06HP230LSDUC-I20 of 33 models qualify · AHRI 215864373
Ducted, 2 tons	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	85.7(50 is the typical model of its size class) (higher)ML24HP230NEXH-Owith ducted air handler ML24HP230HSDUC-I16 of 34 models qualify · AHRI 215864380
Ducted, 2.5–3 tons	88.7(50 is the typical model of its size class)PUZ-AK30NLHZ2***with ducted air handler PVA-AA30NL20 of 30 models qualify · AHRI 218697041	94.4(50 is the typical model of its size class) (higher)RD18AY36AJVCwith ducted air handler L(E,G)M36FJ28 of 90 models qualify · AHRI 218029736
Ducted, 3.5–4.5 tons	80.2(50 is the typical model of its size class)MXZ-SM48NLHZ-**18 of 29 models qualify · AHRI 217135880	95.2(50 is the typical model of its size class) (higher)RD18AY48AJVCwith indoor coil D(A,C,E)60B4J+TDR and furnace R801V0754A17DZ33 of 121 models qualify · AHRI 218827549
Ducted, 5 tons and up	78.1(50 is the typical model of its size class) (higher)MXZ-SM60NLHZ-**6 of 10 models qualify · AHRI 217643004	77.3(50 is the typical model of its size class)SP17AY60AJVCwith indoor coil TCFY6024STANM and furnace S801V1255A24UHNAlso sold as RUUD RP17AY60AJVC2 of 32 models qualify · AHRI 218327534
Non-ducted, up to 1.5 tons	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	94.4(50 is the typical model of its size class)ML06HP230NEXH-Owith ductless indoor unit ML06HP2301WYCAS-I29 of 38 models qualify · AHRI 215864386
Non-ducted, 2 tons	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	89.4(50 is the typical model of its size class) (higher)ML24HP230NEXH-Owith ductless indoor unit ML24HP230STDCAS-I8 of 8 models qualify · AHRI 215864372
Non-ducted, 2.5–3 tons	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	89.4(50 is the typical model of its size class)ML36HP230LCMH-Owith ductless indoor unit ML36HP230FLO-I16 of 19 models qualify · AHRI 215864403
Non-ducted, 3.5–4.5 tons	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	73.4(50 is the typical model of its size class)ML48HP230MULH-O*Also listed as ML48HP230MULH - O11 of 12 models qualify · AHRI 216623576
Non-ducted, 5 tons and up	70.0(50 is the typical model of its size class)MXZ-SM60NLHZ-**Also listed as PUMY-HL60NKMU6 of 6 models qualify · AHRI 217643003	None on this board (0 of 2 models qualify)

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	Mitsubishi ElectricAll-around score, best model	RheemAll-around score, best model
Ducted, up to 1.5 tons	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	95.0(50 is the typical model of its size class) (higher)ML06HP230NEXH-Owith ducted air handler ML06HP230LSDUC-I32 of 32 models have all five ratings · AHRI 215864373
Ducted, 2 tons	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	78.8(50 is the typical model of its size class)ML24HP230NEX-Owith ducted air handler ML24HP230HSDUC-I33 of 33 models have all five ratings · AHRI 215864360
Ducted, 2.5–3 tons	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	92.7(50 is the typical model of its size class)RD18AY36AJVCwith ducted air handler L(E,G)M36FJ65 of 91 models have all five ratings · AHRI 218029736
Ducted, 3.5–4.5 tons	70.4(50 is the typical model of its size class)MXZ-SM48NLHZ-**29 of 29 models have all five ratings · AHRI 217135880	86.3(50 is the typical model of its size class) (higher)RD18AY48AJVCwith ducted air handler L(E,G)M60IJ66 of 116 models have all five ratings · AHRI 218029742
Ducted, 5 tons and up	65.4(50 is the typical model of its size class)MXZ-SM60NLHZ-**10 of 10 models have all five ratings · AHRI 217643004	70.4(50 is the typical model of its size class) (higher)RP17AY60AJVCwith ducted air handler RH2TY6024STANNAlso sold as SURE SP17AY60AJVC22 of 38 models have all five ratings · AHRI 218160613
Non-ducted, up to 1.5 tons	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	93.8(50 is the typical model of its size class)ML06HP230NEXH-Owith ductless indoor unit ML06HP230NEX-I37 of 38 models have all five ratings · AHRI 215864338
Non-ducted, 2 tons	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	76.4(50 is the typical model of its size class)ML24HP230CALH-Owith ductless indoor unit ML24HP230CALH-I8 of 8 models have all five ratings · AHRI 215864348
Non-ducted, 2.5–3 tons	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	78.3(50 is the typical model of its size class)ML36HP230MULH-O*Also listed as ML36HP230MULH - O18 of 19 models have all five ratings · AHRI 216623571
Non-ducted, 3.5–4.5 tons	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	75.6(50 is the typical model of its size class)ML48HP230MULH-O*Also listed as ML48HP230MULH - O12 of 12 models have all five ratings · AHRI 216623574
Non-ducted, 5 tons and up	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	58.6(50 is the typical model of its size class)ML55HP230MUL-O*2 of 2 models have all five ratings · AHRI 216623550

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	Mitsubishi Electric	Rheem
COP at 5°F	beats 100% · 2.70PUZ-AK42NL***Non-ducted, 3.5–4.5 tons	beats 100% · 3.05RP15AY24AJ2NDucted, up to 1.5 tons
Capacity retention at 5°F	beats 99% · 140%MUZ-FX06NLHZ***Also listed as MUZ-FX06NLHZ2Non-ducted, up to 1.5 tons	beats 100% · 150%ML06HP230CALH-ONon-ducted, up to 1.5 tons
HSPF2	beats 100% · 12.0MXZ-SM36NLHZ***Also listed as PUMY-HL36NKMU, MXZ-SM36NLHZ-Non-ducted, 2.5–3 tons	beats 100% · 15.6ML06HP230CALH-ONon-ducted, up to 1.5 tons
SEER2	beats 100% · 35.0MUZ-FX06NLHZ***Also listed as MUZ-FX06NLHZ2Non-ducted, up to 1.5 tons	beats 100% · 35.0ML06HP230CALH-ONon-ducted, up to 1.5 tons
EER2	beats 100% · 21.5MUZ-FX06NLHZ***Also listed as MUZ-FX06NLHZ2Non-ducted, up to 1.5 tons	beats 99% · 17.4ML06HP230CALH-ONon-ducted, up to 1.5 tons
Heating capacity at 5°F	beats 100% · 26,600 Btu/hMUZ-FX24NLHZ***Also listed as MUZ-FX24NLHZ2Non-ducted, up to 1.5 tons	beats 100% · 35,800 Btu/hRP15AY30AJ2NDucted, 2 tons

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Mitsubishi Electric vs Rheem heat pumps