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.

AUX and Daikin 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, AUX scores higher on 5 of the 6 ratings.

AUX
Daikin
Other ranked manufacturers

Source: AHRI Directory, NEEP · as of Oct 25, 2026

Average peer percentile, raw median and rank among ranked manufacturers
Rating	AUX	Daikin
Efficiency index	49%median — · 21st ranked	51%median — · 18th ranked
COP at 5°F	60% (higher)median 2.00 · 7th ranked	48% (higher)median 2.00 · 20th ranked
Capacity retention at 5°F	51% (higher)median 75% · 15th ranked	49% (higher)median 68% · 18th ranked
HSPF2	40% (higher)median 9.0 · 25th ranked	39% (higher)median 7.9 · 26th ranked
SEER2	48% (higher)median 20.0 · 18th ranked	46% (higher)median 16.6 · 20th ranked
EER2	39%median 11.0 · 27th ranked	55%median 11.7 · 14th ranked
Heating capacity at 5°F	49% (higher)median 9,600 Btu/h · 17th ranked	47% (higher)median 23,000 Btu/h · 20th ranked
Outdoor models	189	410
AHRI certifications	223	21,458

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	AUX	Daikin
CEE 2025 Tier 1 (Split ASHP)	68.3%129 models	39.5%162 models
CEE 2026 Tier 1 (Split ASHP)	66.1%125 models	35.4%145 models
CEE Advanced Tier (Split ASHP)	1.1%2 models	2.2%9 models
Xcel Energy Colorado cold-climate ASHP (2025)	65.6%124 models	30.5%125 models
DOE Cold Climate Heat Pump Challenge	1.1%2 models	2.2%9 models
ENERGY STAR Cold Climate	34.9%66 models	17.6%72 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

AUX
Daikin
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 25, 2026

Models per peer group · efficiency index within the group
Size and duct type	AUX	Daikin
Ducted, up to 1.5 tons	6 · index 60%	35 · index 40%
Ducted, 2 tons	4 · index 59%	49 · index 44%
Ducted, 2.5–3 tons	9 · index 63%	110 · index 52%
Ducted, 3.5–4.5 tons	5 · index 61%	152 · index 57%
Ducted, 5 tons and up	None	16 · index 49%
Non-ducted, up to 1.5 tons	120 · index 46%	46 · index 49%
Non-ducted, 2 tons	33 · index 52%	13 · index 51%
Non-ducted, 2.5–3 tons	22 · index 46%	11 · index 49%
Non-ducted, 3.5–4.5 tons	2 · index 73%	7 · index 33%
Non-ducted, 5 tons and up	None	1 · index 48%

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	AUXCold-climate score, best model	DaikinCold-climate score, best model
Ducted, up to 1.5 tons	75.4(50 is the typical model of its size class)ASUM18HPMULO6 of 6 models qualify · AHRI 216032437	86.7(50 is the typical model of its size class) (higher)MST183G32MHAA16 of 35 models qualify · AHRI 218083367
Ducted, 2 tons	62.9(50 is the typical model of its size class)ASUM24HPMULO4 of 4 models qualify · AHRI 216032438	89.2(50 is the typical model of its size class) (higher)DH9VSA241CAwith ducted air handler CAHEA3630C3A+MBVK16CH*X00AAlso sold as Amana AZV9SA241CA, Goodman GZV9SA241CA12 of 49 models qualify · AHRI 216699791
Ducted, 2.5–3 tons	73.8(50 is the typical model of its size class)ASPR30HPMULO6 of 9 models qualify · AHRI 216032400	90.4(50 is the typical model of its size class) (higher)MST273G32MHAA37 of 110 models qualify · AHRI 218083370
Ducted, 3.5–4.5 tons	77.1(50 is the typical model of its size class) (higher)ASUM42HPMULO5 of 5 models qualify · AHRI 216032440	72.5(50 is the typical model of its size class)GLZS4BA6010Awith ducted air handler M60G55+TXV+AMHE5D50 of 152 models qualify · AHRI 218159995
Ducted, 5 tons and up	No models in this size class	77.7(50 is the typical model of its size class)RXTA60AAVJU*1 of 16 models qualify · AHRI 217178417
Non-ducted, up to 1.5 tons	83.5(50 is the typical model of its size class)AM2-H18/2DR3BAlso listed as ASUM18HPMULO80 of 120 models qualify · AHRI 214097940	84.5(50 is the typical model of its size class) (higher)MST183G32MHAA37 of 46 models qualify · AHRI 218083366
Non-ducted, 2 tons	84.6(50 is the typical model of its size class) (higher)AM3-H24/2DR3BAlso listed as ASUM24HPMULO16 of 33 models qualify · AHRI 214097943	77.2(50 is the typical model of its size class)RXTA24AAVJU*10 of 13 models qualify · AHRI 217178408
Non-ducted, 2.5–3 tons	73.4(50 is the typical model of its size class)AM4-H36/2DR3BAlso listed as ASUM36HPMULO18 of 22 models qualify · AHRI 214097941	83.7(50 is the typical model of its size class) (higher)MST273G32MHAA9 of 11 models qualify · AHRI 218083371
Non-ducted, 3.5–4.5 tons	60.1(50 is the typical model of its size class) (higher)ASUM42HPMULO2 of 2 models qualify · AHRI 216050942	47.4(50 is the typical model of its size class)RXLA48AAVJU*7 of 7 models qualify · AHRI 217178413
Non-ducted, 5 tons and up	No models in this size class	70.9(50 is the typical model of its size class)RXTA60AAVJU*1 of 1 models qualify · AHRI 217178411

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	AUXAll-around score, best model	DaikinAll-around score, best model
Ducted, up to 1.5 tons	79.8(50 is the typical model of its size class)ASUM18HPMULO6 of 6 models have all five ratings · AHRI 216032437	92.5(50 is the typical model of its size class) (higher)MST183G32MHAA33 of 33 models have all five ratings · AHRI 218083367
Ducted, 2 tons	78.2(50 is the typical model of its size class)ASUM24HPMULO4 of 4 models have all five ratings · AHRI 216032438	88.1(50 is the typical model of its size class) (higher)DH9VSA241CAwith ducted air handler CAHEA3630C3A+MBVK16CH*X00AAlso sold as Amana AZV9SA241CA, Goodman GZV9SA241CA31 of 43 models have all five ratings · AHRI 216699791
Ducted, 2.5–3 tons	81.4(50 is the typical model of its size class)ASUM36HPMULO9 of 9 models have all five ratings · AHRI 216032439	91.8(50 is the typical model of its size class) (higher)MST273G32MHAA83 of 112 models have all five ratings · AHRI 218083370
Ducted, 3.5–4.5 tons	87.2(50 is the typical model of its size class) (higher)ASUM42HPMULO5 of 5 models have all five ratings · AHRI 216032440	79.0(50 is the typical model of its size class)DPSH04BAPB2**E350Also listed as DPSH04BAPB3*E350, DPSH04BAPB4**E350, DPSH04BAPB5**E350120 of 153 models have all five ratings · AHRI 216030296
Ducted, 5 tons and up	No models in this size class	63.2(50 is the typical model of its size class)GLZT7CA6010A*with ducted air handler AMVT60DP1300A20 of 21 models have all five ratings · AHRI 216369259
Non-ducted, up to 1.5 tons	84.2(50 is the typical model of its size class)ASW-H18E3B2/R3DI-D2with ductless indoor unit ASW-H18E3B2/R3DI-D2Also listed as ASW-H18E3B2/**R3DI-D2102 of 120 models have all five ratings · AHRI 215218928	90.5(50 is the typical model of its size class) (higher)MST183G32MHAA46 of 46 models have all five ratings · AHRI 218083366
Non-ducted, 2 tons	87.0(50 is the typical model of its size class) (higher)ASW-H24F6A2/ R3DI-D7with ductless indoor unit ASW-H24F6A2/ R3DI-D7Also listed as ASW-H24F6A2/**R3DI-D729 of 33 models have all five ratings · AHRI 217115274	85.9(50 is the typical model of its size class)RXTA24AAVJU*13 of 13 models have all five ratings · AHRI 217178408
Non-ducted, 2.5–3 tons	78.5(50 is the typical model of its size class)AM4-H36/2DR3BAlso listed as ASUM36HPMULO18 of 22 models have all five ratings · AHRI 214097941	89.3(50 is the typical model of its size class) (higher)MST273G32MHAA11 of 11 models have all five ratings · AHRI 218083369
Non-ducted, 3.5–4.5 tons	74.4(50 is the typical model of its size class) (higher)ASUM42HPMULO2 of 2 models have all five ratings · AHRI 216050942	48.2(50 is the typical model of its size class)RXLA48AAVJU*7 of 7 models have all five ratings · AHRI 217178413
Non-ducted, 5 tons and up	No models in this size class	48.4(50 is the typical model of its size class)RXTA60AAVJU*1 of 1 models have all five ratings · AHRI 217178411

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	AUX	Daikin
COP at 5°F	beats 100% · 2.52AFEB09HP115V1CONon-ducted, up to 1.5 tons	beats 100% · 2.50RXTA36AAVJU*Non-ducted, 2.5–3 tons
Capacity retention at 5°F	beats 99% · 108%AM3-H24/2DR3BAlso listed as ASUM24HPMULONon-ducted, 2 tons	beats 99% · 109%RZA30AAVJU*Non-ducted, 2.5–3 tons
HSPF2	beats 96% · 11.0AM4-H36/2DR3BAlso listed as ASUM36HPMULONon-ducted, 2.5–3 tons	beats 96% · 10.5MST273G32MHAADucted, 2.5–3 tons
SEER2	beats 100% · 22.0ASUM42HPMULODucted, 3.5–4.5 tons	beats 98% · 21.0DH9VSA361CA*Also sold as Amana AZV9SA361CA, Goodman GZV9SA361CADucted, 2.5–3 tons
EER2	beats 97% · 14.0AMAR24HP230V1CONon-ducted, 2 tons	beats 100% · 14.5MST183G32MHAADucted, up to 1.5 tons
Heating capacity at 5°F	beats 99% · 21,800 Btu/hAM2-H18/2DR3BAlso listed as ASUM18HPMULONon-ducted, up to 1.5 tons	beats 99% · 21,600 Btu/hRXM18WVJU*Non-ducted, up to 1.5 tons

In the cold

NEEP cold-climate listings of both manufacturers against all listed models.

AUX vs Daikin: capacity and COP from 47°F downNEEP cold-climate listings at maximum capacity · 6,130 models (45.8% of the catalog) have ratings at 47, 17 and 5°F

All listed models (median, middle 50% and 80%)
AUX (median, middle 50%)
Daikin (median, middle 50%)

One curve per model: its NEEP-rated certification with the best 5°F COP. Every point of a curve is over the same models. NEEP lists only models submitted to it, so this is a cold-climate-leaning subset, not the whole catalog.

Show the data as a table

All listed models: capacity, % of its 47°F maximum
Scope, temperature	Models	10th pct.	25th	Median	75th	90th
All rated models, 47°F	6,130	100%	100%	100%	100%	100%
All rated models, 17°F	6,130	64%	69%	74%	83%	91%
All rated models, 5°F	6,130	57%	61%	69%	77%	83%

All listed models: COP at maximum capacity
Scope, temperature	Models	10th pct.	25th	Median	75th	90th
All rated models, 47°F	6,130	2.8	3.01	3.24	3.48	3.66
All rated models, 17°F	6,130	2	2.14	2.3	2.42	2.61
All rated models, 5°F	6,130	1.8	1.87	2	2.1	2.24

AUX: capacity, % of its 47°F maximum
Scope, temperature	Models	10th pct.	25th	Median	75th	90th
AUX, 47°F	65	100%	100%	100%	100%	100%
AUX, 17°F	65	67%	70%	73%	79%	85%
AUX, 5°F	65	62%	65%	70%	73%	83%

AUX: COP at maximum capacity
Scope, temperature	Models	10th pct.	25th	Median	75th	90th
AUX, 47°F	65	2.93	3.18	3.3	3.52	3.72
AUX, 17°F	65	2.1	2.17	2.28	2.34	2.45
AUX, 5°F	65	1.89	2	2	2.1	2.18

Daikin: capacity, % of its 47°F maximum
Scope, temperature	Models	10th pct.	25th	Median	75th	90th
Daikin, 47°F	135	100%	100%	100%	100%	100%
Daikin, 17°F	135	67%	72%	80%	90%	101%
Daikin, 5°F	135	53%	60%	70%	75%	87%

Daikin: COP at maximum capacity
Scope, temperature	Models	10th pct.	25th	Median	75th	90th
Daikin, 47°F	135	2.92	3.17	3.3	3.58	3.92
Daikin, 17°F	135	2.09	2.24	2.3	2.55	2.74
Daikin, 5°F	135	1.8	1.8	2	2.1	2.23

Source: NEEP ccASHP list · as of Oct 25, 2026

More comparisons

Pick any two manufacturers

AUX vs Daikin heat pumps