Fuji vs MDX heat pumps

Measured against models of the same size and duct type, MDX scores higher on 6 of the 6 ratings. Fuji has 12 outdoor models, MDX has 12 outdoor models. Fuji and MDX have no QMID on file and are not ranked.

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CompareData as of Oct 11, 2026updated Oct 11, 2026 · sources

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.

Fuji and MDX 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, MDX scores higher on 6 of the 6 ratings.

Fuji
MDX
Other ranked manufacturers

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

Average peer percentile, raw median and rank among ranked manufacturers
Rating	Fuji	MDX
Efficiency index	52%median —	66%median —
COP at 5°F	54%median 2.00	81%median 2.20
Capacity retention at 5°F	57%median 78%	64%median 75%
HSPF2	55%median 9.0	79%median 9.7
SEER2	59%median 19.0	70%median 18.0
EER2	37%median 10.9	46%median 11.0
Heating capacity at 5°F	60%median 24,200 Btu/h	64%median 30,500 Btu/h
Outdoor models	12	12
AHRI certifications	12	12

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	Fuji	MDX
CEE 2025 Tier 1 (Split ASHP)	75%9 models	91.7%11 models
CEE 2026 Tier 1 (Split ASHP)	75%9 models	91.7%11 models
CEE Advanced Tier (Split ASHP)	0%0 models	16.7%2 models
Xcel Energy Colorado cold-climate ASHP (2025)	66.7%8 models	91.7%11 models
DOE Cold Climate Heat Pump Challenge	0%0 models	16.7%2 models
ENERGY STAR Cold Climate	0%0 models	100%12 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 · 3 groups where both have models

Fuji
MDX
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	Fuji	MDX
Ducted, up to 1.5 tons	1 · index 47%	None
Ducted, 2 tons	1 · index 38%	3 · index 79%
Ducted, 2.5–3 tons	2 · index 43%	3 · index 63%
Ducted, 3.5–4.5 tons	2 · index 51%	6 · index 61%
Non-ducted, up to 1.5 tons	1 · index 60%	None
Non-ducted, 2 tons	1 · index 72%	None
Non-ducted, 2.5–3 tons	4 · index 54%	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	FujiCold-climate score, best model	MDXCold-climate score, best model
Ducted, up to 1.5 tons	49.5(50 is the typical model of its size class)FAH18HP230Uwith ducted air handler FAH18HP230N1 of 1 models qualify · AHRI 218679836	No models in this size class
Ducted, 2 tons	46.6(50 is the typical model of its size class)FAH24HP230Uwith ducted air handler FAH24HP230N1 of 1 models qualify · AHRI 218679837	89.5(50 is the typical model of its size class) (higher)MCHA-24HDCTO2with ducted air handler MCHA-24HDCANI23 of 3 models qualify · AHRI 218516908
Ducted, 2.5–3 tons	None on this board (0 of 2 models qualify)	78.1(50 is the typical model of its size class)MCHA-36HDCTO2with ducted air handler MCHA-36HDCANI23 of 3 models qualify · AHRI 218516909
Ducted, 3.5–4.5 tons	72.3(50 is the typical model of its size class)FAH48HP230Uwith ducted air handler FAH48HP230N2 of 2 models qualify · AHRI 218679840	79.5(50 is the typical model of its size class) (higher)MCHA-48HDCTO2with ducted air handler MCHA-48HDCANI26 of 6 models qualify · AHRI 218516910
Non-ducted, up to 1.5 tons	64.6(50 is the typical model of its size class)FM2H18D230U1 of 1 models qualify · AHRI 218668536	No models in this size class
Non-ducted, 2 tons	67.5(50 is the typical model of its size class)FM3H24D230U1 of 1 models qualify · AHRI 218668537	No models in this size class
Non-ducted, 2.5–3 tons	59.0(50 is the typical model of its size class)FM4H42D230U4 of 4 models qualify · AHRI 218668540	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	FujiAll-around score, best model	MDXAll-around score, best model
Ducted, up to 1.5 tons	47.2(50 is the typical model of its size class)FAH18HP230Uwith ducted air handler FAH18HP230N1 of 1 models have all five ratings · AHRI 218679836	No models in this size class
Ducted, 2 tons	37.6(50 is the typical model of its size class)FAH24HP230Uwith ducted air handler FAH24HP230N1 of 1 models have all five ratings · AHRI 218679837	85.0(50 is the typical model of its size class) (higher)MCHA-24HDCTO2with ducted air handler MCHA-24HDCANI23 of 3 models have all five ratings · AHRI 218516908
Ducted, 2.5–3 tons	43.0(50 is the typical model of its size class)FAH30HP230Uwith ducted air handler FAH30HP230N2 of 2 models have all five ratings · AHRI 218679838	65.1(50 is the typical model of its size class) (higher)MHPA-36DCTOwith ducted air handler MHPA-36DCTI3 of 3 models have all five ratings · AHRI 217933371
Ducted, 3.5–4.5 tons	53.2(50 is the typical model of its size class)FAH48HP230Uwith ducted air handler FAH48HP230N2 of 2 models have all five ratings · AHRI 218679840	68.3(50 is the typical model of its size class) (higher)MHPA-48DCTOwith ducted air handler MHPA-48DCTI6 of 6 models have all five ratings · AHRI 217933372
Non-ducted, up to 1.5 tons	59.8(50 is the typical model of its size class)FM2H18D230U1 of 1 models have all five ratings · AHRI 218668536	No models in this size class
Non-ducted, 2 tons	71.8(50 is the typical model of its size class)FM3H24D230U1 of 1 models have all five ratings · AHRI 218668537	No models in this size class
Non-ducted, 2.5–3 tons	66.6(50 is the typical model of its size class)FM4H30D230U4 of 4 models have all five ratings · AHRI 218668538	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	Fuji	MDX
COP at 5°F	beats 69% · 2.10FAH48HP230UDucted, 3.5–4.5 tons	beats 89% · 2.30MCHA-36HDCTO2Ducted, 2.5–3 tons
Capacity retention at 5°F	beats 79% · 90%FM3H24D230UNon-ducted, 2 tons	beats 92% · 100%MCHA-24HDCTO2Ducted, 2 tons
HSPF2	beats 69% · 9.0FAH48HP230UDucted, 3.5–4.5 tons	beats 90% · 10.5MCHA-48HDCTO2Ducted, 3.5–4.5 tons
SEER2	beats 79% · 23.0FM3H24D230UNon-ducted, 2 tons	beats 87% · 20.0MHPA-24DCTODucted, 2 tons
EER2	beats 75% · 12.5FM4H30D230UNon-ducted, 2.5–3 tons	beats 98% · 14.0MHPA-24DCTODucted, 2 tons
Heating capacity at 5°F	beats 85% · 14,500 Btu/hFM2H18D230UNon-ducted, up to 1.5 tons	beats 89% · 24,000 Btu/hMCHA-24HDCTO2Ducted, 2 tons

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