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.

DUOHOME and KERR 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, KERR scores higher on 5 of the 6 ratings.

DUOHOME
KERR
Other ranked manufacturers

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

Average peer percentile, raw median and rank among ranked manufacturers
Rating	DUOHOME	KERR
Efficiency index	52%median —	66%median —
COP at 5°F	51% (higher)median 1.99	49% (higher)median 1.95
Capacity retention at 5°F	38%median 66%	78%median 91%
HSPF2	61%median 9.3	76%median 10.0
SEER2	57%median 20.0	68%median 20.0
EER2	44%median 10.7	58%median 11.9
Heating capacity at 5°F	43%median 14,800 Btu/h	75%median 25,000 Btu/h
Outdoor models	22	24
AHRI certifications	37	90

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	DUOHOME	KERR
CEE 2025 Tier 1 (Split ASHP)	59.1%13 models	83.3%20 models
CEE 2026 Tier 1 (Split ASHP)	50%11 models	83.3%20 models
CEE Advanced Tier (Split ASHP)	0%0 models	8.3%2 models
Xcel Energy Colorado cold-climate ASHP (2025)	27.3%6 models	79.2%19 models
DOE Cold Climate Heat Pump Challenge	0%0 models	8.3%2 models
ENERGY STAR Cold Climate	0%0 models	87.5%21 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

DUOHOME
KERR
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	DUOHOME	KERR
Ducted, up to 1.5 tons	2 · index 69%	6 · index 60%
Ducted, 2 tons	1 · index 84%	3 · index 71%
Ducted, 2.5–3 tons	4 · index 55%	5 · index 67%
Ducted, 3.5–4.5 tons	4 · index 53%	4 · index 63%
Ducted, 5 tons and up	1 · index 55%	None
Non-ducted, up to 1.5 tons	9 · index 49%	7 · index 68%
Non-ducted, 2 tons	2 · index 47%	3 · index 79%
Non-ducted, 2.5–3 tons	5 · index 49%	6 · index 64%
Non-ducted, 3.5–4.5 tons	3 · index 43%	2 · index 65%

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	DUOHOMECold-climate score, best model	KERRCold-climate score, best model
Ducted, up to 1.5 tons	52.0(50 is the typical model of its size class)D2OA-18HFN1-M1 of 2 models qualify · AHRI 211911389	74.9(50 is the typical model of its size class) (higher)A-KMH09SV-1with ducted air handler B-KMH09DU-16 of 6 models qualify · AHRI 210568255
Ducted, 2 tons	80.3(50 is the typical model of its size class) (higher)DOD33-24HFN1-MT0Wwith ducted air handler DTIU-24HWFN1-M1 of 1 models qualify · AHRI 214797741	79.4(50 is the typical model of its size class)A-KMH24SU-1Awith ducted air handler B-KMH24DU-1Also listed as A-KMH24SV-13 of 3 models qualify · AHRI 206347321
Ducted, 2.5–3 tons	57.8(50 is the typical model of its size class)D3OJ-27HFN1-M1 of 4 models qualify · AHRI 211911392	79.9(50 is the typical model of its size class) (higher)A-KMH36QV-1A5 of 5 models qualify · AHRI 217169741
Ducted, 3.5–4.5 tons	None on this board (0 of 4 models qualify)	74.9(50 is the typical model of its size class)A-KMH48PV-14 of 4 models qualify · AHRI 207657607
Ducted, 5 tons and up	None on this board (0 of 1 models qualify)	No models in this size class
Non-ducted, up to 1.5 tons	63.3(50 is the typical model of its size class)DOX230-09HFN1-MW5Wwith ductless indoor unit DCA3U-09HRFN1-M(C)3 of 9 models qualify · AHRI 214875723	89.3(50 is the typical model of its size class) (higher)A-KMH06SV-1with ductless indoor unit B-KMH06SV-17 of 7 models qualify · AHRI 207657393
Non-ducted, 2 tons	59.4(50 is the typical model of its size class)DOD33-24HFN1-MT0Wwith ductless indoor unit DCD1-24HRFN1-MT0W(GA)1 of 2 models qualify · AHRI 214875724	86.1(50 is the typical model of its size class) (higher)A-KMH24SV-1with ductless indoor unit C-VMH24CV-13 of 3 models qualify · AHRI 207657400
Non-ducted, 2.5–3 tons	50.1(50 is the typical model of its size class)D3OJ-27HFN1-M1 of 5 models qualify · AHRI 211911391	90.9(50 is the typical model of its size class) (higher)A-KMH36QV-1A3 of 6 models qualify · AHRI 217169740
Non-ducted, 3.5–4.5 tons	None on this board (0 of 3 models qualify)	76.2(50 is the typical model of its size class)A-KMH48PV-12 of 2 models qualify · AHRI 207657606

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	DUOHOMEAll-around score, best model	KERRAll-around score, best model
Ducted, up to 1.5 tons	78.5(50 is the typical model of its size class)DOX430-18HFN1-MU0Wwith ducted air handler DTIU-18HWFN1-M2 of 2 models have all five ratings · AHRI 214797740	85.2(50 is the typical model of its size class) (higher)A-KMH09SV-1with ducted air handler B-KMH09DU-16 of 6 models have all five ratings · AHRI 210568255
Ducted, 2 tons	83.8(50 is the typical model of its size class) (higher)DOD33-24HFN1-MT0Wwith ducted air handler DTIU-24HWFN1-M1 of 1 models have all five ratings · AHRI 214797741	80.1(50 is the typical model of its size class)A-KMH24SU-1Awith ducted air handler B-KMH24DU-1Also listed as A-KMH24SV-13 of 3 models have all five ratings · AHRI 206347321
Ducted, 2.5–3 tons	71.7(50 is the typical model of its size class)D3OJ-27HFN1-M3 of 4 models have all five ratings · AHRI 211911392	83.7(50 is the typical model of its size class) (higher)A-KMH36QV-1A5 of 5 models have all five ratings · AHRI 217169741
Ducted, 3.5–4.5 tons	63.5(50 is the typical model of its size class)D5OG-48HFN1-M3 of 4 models have all five ratings · AHRI 211911398	82.0(50 is the typical model of its size class) (higher)A-KMH48PV-14 of 4 models have all five ratings · AHRI 207657607
Ducted, 5 tons and up	54.5(50 is the typical model of its size class)DOE30U-60HFN1-Mwith ducted air handler DHG-60HWFN1-MW1 of 1 models have all five ratings · AHRI 206314613	No models in this size class
Non-ducted, up to 1.5 tons	71.6(50 is the typical model of its size class)DOX230-12HFN1-MV5Wwith ductless indoor unit DCA3U-12HRFN1-M(C)9 of 9 models have all five ratings · AHRI 214875728	92.0(50 is the typical model of its size class) (higher)A-KMH06SV-1with ductless indoor unit B-KMH06SV-17 of 7 models have all five ratings · AHRI 207657393
Non-ducted, 2 tons	66.3(50 is the typical model of its size class)DOD33-24HFN1-MT0Wwith ductless indoor unit DCD1-24HRFN1-MT0W(GA)2 of 2 models have all five ratings · AHRI 214875724	84.3(50 is the typical model of its size class) (higher)A-KMH24SV-1with ductless indoor unit B-KMH24SV-1Also listed as A-KMH24SU-13 of 3 models have all five ratings · AHRI 207657397
Non-ducted, 2.5–3 tons	67.1(50 is the typical model of its size class)D3OJ-27HFN1-M4 of 5 models have all five ratings · AHRI 211911391	86.4(50 is the typical model of its size class) (higher)A-KMH36QV-1A5 of 6 models have all five ratings · AHRI 217169740
Non-ducted, 3.5–4.5 tons	48.3(50 is the typical model of its size class)D5OG-48HFN1-M3 of 3 models have all five ratings · AHRI 211911397	77.9(50 is the typical model of its size class) (higher)A-KMH48PV-12 of 2 models have all five ratings · AHRI 207657606

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	DUOHOME	KERR
COP at 5°F	beats 92% · 2.28DOX230-12HFN1-MV5WNon-ducted, up to 1.5 tons	beats 91% · 2.21A-KMH24SV-1Also listed as A-KMH24SU-1Non-ducted, 2 tons
Capacity retention at 5°F	beats 73% · 59%DOE30U-60HFN1-MDucted, 5 tons and up	beats 98% · 112%A-KCD36SA-1Ducted, 2.5–3 tons
HSPF2	beats 98% · 11.2DOD33-24HFN1-MT0WDucted, 2 tons	beats 98% · 13.6A-KMH06SV-1Non-ducted, up to 1.5 tons
SEER2	beats 98% · 21.0D3OJ-27HFN1-MDucted, 2.5–3 tons	beats 99% · 20.9A-KMH48PV-1Ducted, 3.5–4.5 tons
EER2	beats 85% · 12.5DOD33-24HFN1-MT0WDucted, 2 tons	beats 98% · 16.2A-KMH09SV-1Non-ducted, up to 1.5 tons
Heating capacity at 5°F	beats 78% · 35,600 Btu/hDOE30U-60HFN1-MDucted, 5 tons and up	beats 99% · 42,000 Btu/hA-KCD36SA-1Ducted, 2.5–3 tons

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DUOHOME vs KERR heat pumps