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 Friedrich 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 6 of the 6 ratings.

AUX
Friedrich
Other ranked manufacturers

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

Average peer percentile, raw median and rank among ranked manufacturers
Rating	AUX	Friedrich
Efficiency index	49% (higher)median — · 21st ranked	39% (higher)median — · 28th ranked
COP at 5°F	60% (higher)median 2.00 · 7th ranked	46% (higher)median 1.97 · 24th ranked
Capacity retention at 5°F	51% (higher)median 75% · 15th ranked	35% (higher)median 51% · 28th ranked
HSPF2	40% (higher)median 9.0 · 25th ranked	31% (higher)median 7.5 · 28th ranked
SEER2	48% (higher)median 20.0 · 18th ranked	34% (higher)median 15.2 · 28th ranked
EER2	39% (higher)median 11.0 · 27th ranked	38% (higher)median 10.6 · 28th ranked
Heating capacity at 5°F	49% (higher)median 9,600 Btu/h · 17th ranked	34% (higher)median 17,000 Btu/h · 28th ranked
Outdoor models	189	188
AHRI certifications	223	6,795

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	AUX	Friedrich
CEE 2025 Tier 1 (Split ASHP)	68.3%129 models	27.1%51 models
CEE 2026 Tier 1 (Split ASHP)	66.1%125 models	23.9%45 models
CEE Advanced Tier (Split ASHP)	1.1%2 models	0.5%1 models
Xcel Energy Colorado cold-climate ASHP (2025)	65.6%124 models	21.3%40 models
DOE Cold Climate Heat Pump Challenge	1.1%2 models	0.5%1 models
ENERGY STAR Cold Climate	34.9%66 models	22.3%42 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
Friedrich
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	Friedrich
Ducted, up to 1.5 tons	6 · index 60%	21 · index 31%
Ducted, 2 tons	4 · index 59%	21 · index 31%
Ducted, 2.5–3 tons	9 · index 63%	46 · index 36%
Ducted, 3.5–4.5 tons	5 · index 61%	57 · index 40%
Ducted, 5 tons and up	None	22 · index 36%
Non-ducted, up to 1.5 tons	120 · index 46%	20 · index 57%
Non-ducted, 2 tons	33 · index 52%	5 · index 51%
Non-ducted, 2.5–3 tons	22 · index 46%	4 · index 48%
Non-ducted, 3.5–4.5 tons	2 · index 73%	2 · index 47%

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	FriedrichCold-climate score, best model
Ducted, up to 1.5 tons	75.4(50 is the typical model of its size class) (higher)ASUM18HPMULO6 of 6 models qualify · AHRI 216032437	73.7(50 is the typical model of its size class)FPHFR24A3Dwith ducted air handler FPHFA18A3D6 of 22 models qualify · AHRI 217505657
Ducted, 2 tons	62.9(50 is the typical model of its size class)ASUM24HPMULO4 of 4 models qualify · AHRI 216032438	67.4(50 is the typical model of its size class) (higher)FRP17AY24AJVCwith indoor coil RCFY2417STANM and furnace FR962V0603A17M4S4 of 20 models qualify · AHRI 218328414
Ducted, 2.5–3 tons	73.8(50 is the typical model of its size class)ASPR30HPMULO6 of 9 models qualify · AHRI 216032400	78.5(50 is the typical model of its size class) (higher)RD18AY36AJVCwith indoor coil RCFY3621MTANM and furnace FR801V0504A17UHN6 of 46 models qualify · AHRI 216891246
Ducted, 3.5–4.5 tons	77.1(50 is the typical model of its size class)ASUM42HPMULO5 of 5 models qualify · AHRI 216032440	83.9(50 is the typical model of its size class) (higher)FPHFR48A3Dwith ducted air handler FPHFA48A3D9 of 57 models qualify · AHRI 217508872
Ducted, 5 tons and up	No models in this size class	78.0(50 is the typical model of its size class)FRP17AY60AJVCwith indoor coil RCFY6024STANM and furnace FR801V1255A24UHN1 of 22 models qualify · AHRI 218328110
Non-ducted, up to 1.5 tons	83.5(50 is the typical model of its size class) (higher)AM2-H18/2DR3BAlso listed as ASUM18HPMULO80 of 120 models qualify · AHRI 214097940	83.4(50 is the typical model of its size class)FPHSR09A3Bwith ductless indoor unit FAHFW09A3AAlso listed as FPHSR09A3D16 of 20 models qualify · AHRI 214232408
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	76.6(50 is the typical model of its size class)FPHFR24A3Dwith ductless indoor unit FPHFC24A3D5 of 5 models qualify · AHRI 216626155
Non-ducted, 2.5–3 tons	73.4(50 is the typical model of its size class) (higher)AM4-H36/2DR3BAlso listed as ASUM36HPMULO18 of 22 models qualify · AHRI 214097941	58.8(50 is the typical model of its size class)FPHFR36A3Dwith ductless indoor unit FPHSC36A3D3 of 4 models qualify · AHRI 216699608
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	49.9(50 is the typical model of its size class)FPHFR48A3Dwith ductless indoor unit FPHSC48A3D2 of 2 models qualify · AHRI 216699609

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	FriedrichAll-around score, best model
Ducted, up to 1.5 tons	79.8(50 is the typical model of its size class) (higher)ASUM18HPMULO6 of 6 models have all five ratings · AHRI 216032437	68.5(50 is the typical model of its size class)FPHFR24A3Dwith ducted air handler FPHFA18A3D21 of 21 models have all five ratings · AHRI 217505657
Ducted, 2 tons	78.2(50 is the typical model of its size class) (higher)ASUM24HPMULO4 of 4 models have all five ratings · AHRI 216032438	75.4(50 is the typical model of its size class)FRP19AY24AJVCwith ducted air handler FRHMVY3621MEACA20 of 20 models have all five ratings · AHRI 215739593
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	85.1(50 is the typical model of its size class) (higher)FRP19AY36AJVCwith ducted air handler FRHMVY3621MEACA33 of 46 models have all five ratings · AHRI 215584440
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	84.3(50 is the typical model of its size class)FRP19AY48AJVCwith ducted air handler FRHMVY4821SEACA35 of 54 models have all five ratings · AHRI 215584441
Ducted, 5 tons and up	No models in this size class	70.6(50 is the typical model of its size class)FRP17AY60AJVCwith ducted air handler RH2TY6024STANN16 of 26 models have all five ratings · AHRI 218328406
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	85.0(50 is the typical model of its size class) (higher)FPHSR09A3Bwith ductless indoor unit FAHFW09A3AAlso listed as FPHSR09A3D20 of 20 models have all five ratings · AHRI 214232408
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	63.2(50 is the typical model of its size class)FPHSR24A3Bwith ductless indoor unit FAHFW24A3AAlso listed as FPHSR24A3D5 of 5 models have all five ratings · AHRI 214091820
Non-ducted, 2.5–3 tons	78.5(50 is the typical model of its size class) (higher)AM4-H36/2DR3BAlso listed as ASUM36HPMULO18 of 22 models have all five ratings · AHRI 214097941	64.8(50 is the typical model of its size class)FPHMR27A3D4 of 4 models have all five ratings · AHRI 215792839
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	49.4(50 is the typical model of its size class)FPHFR48A3Dwith ductless indoor unit FPHSC48A3D2 of 2 models have all five ratings · AHRI 216699609

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	Friedrich
COP at 5°F	beats 100% · 2.52AFEB09HP115V1CONon-ducted, up to 1.5 tons	beats 98% · 2.61WFPU17Y243DDucted, up to 1.5 tons
Capacity retention at 5°F	beats 99% · 108%AM3-H24/2DR3BAlso listed as ASUM24HPMULONon-ducted, 2 tons	beats 100% · 133%FPHFR09A3DDucted, up to 1.5 tons
HSPF2	beats 96% · 11.0AM4-H36/2DR3BAlso listed as ASUM36HPMULONon-ducted, 2.5–3 tons	beats 90% · 9.5FRP17AY60AJVCDucted, 5 tons and up
SEER2	beats 100% · 22.0ASUM42HPMULODucted, 3.5–4.5 tons	beats 98% · 21.0FRP19AY36AJVCDucted, 2.5–3 tons
EER2	beats 97% · 14.0AMAR24HP230V1CONon-ducted, 2 tons	beats 97% · 13.0RD18AY36AJVCDucted, 2.5–3 tons
Heating capacity at 5°F	beats 99% · 21,800 Btu/hAM2-H18/2DR3BAlso listed as ASUM18HPMULONon-ducted, up to 1.5 tons	beats 96% · 18,600 Btu/hRD18AY24AJVCDucted, up to 1.5 tons

In the cold

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

AUX vs Friedrich: 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%)
Friedrich (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

Friedrich: capacity, % of its 47°F maximum
Scope, temperature	Models	10th pct.	25th	Median	75th	90th
Friedrich, 47°F	44	100%	100%	100%	100%	100%
Friedrich, 17°F	44	60%	65%	68%	84%	92%
Friedrich, 5°F	44	57%	62%	71%	74%	85%

Friedrich: COP at maximum capacity
Scope, temperature	Models	10th pct.	25th	Median	75th	90th
Friedrich, 47°F	44	2.8	2.9	3.08	3.21	3.46
Friedrich, 17°F	44	2.07	2.2	2.4	2.5	2.51
Friedrich, 5°F	44	1.89	1.9	2	2.09	2.1

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

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AUX vs Friedrich heat pumps