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.

1HVAC and KADEN 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, KADEN scores higher on 4 of the 6 ratings.

1HVAC
KADEN
Other ranked manufacturers

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

Average peer percentile, raw median and rank among ranked manufacturers
Rating	1HVAC	KADEN
Efficiency index	54%median —	58%median —
COP at 5°F	44%median 1.90	52%median 2.00
Capacity retention at 5°F	62% (higher)median 77%	41% (higher)median 65%
HSPF2	61%median 9.2	69%median 9.3
SEER2	59%median 18.0	74%median 19.3
EER2	43%median 11.0	49%median 10.9
Heating capacity at 5°F	61% (higher)median 23,400 Btu/h	44% (higher)median 18,250 Btu/h
Outdoor models	87	24
AHRI certifications	1,190	37

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	1HVAC	KADEN
CEE 2025 Tier 1 (Split ASHP)	63.2%55 models	66.7%16 models
CEE 2026 Tier 1 (Split ASHP)	59.8%52 models	54.2%13 models
CEE Advanced Tier (Split ASHP)	1.1%1 models	0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)	55.2%48 models	25%6 models
DOE Cold Climate Heat Pump Challenge	1.1%1 models	0%0 models
ENERGY STAR Cold Climate	41.4%36 models	25%6 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

1HVAC
KADEN
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	1HVAC	KADEN
Ducted, up to 1.5 tons	9 · index 57%	3 · index 42%
Ducted, 2 tons	10 · index 58%	2 · index 52%
Ducted, 2.5–3 tons	18 · index 54%	6 · index 52%
Ducted, 3.5–4.5 tons	22 · index 53%	4 · index 55%
Ducted, 5 tons and up	None	2 · index 42%
Non-ducted, up to 1.5 tons	21 · index 55%	7 · index 73%
Non-ducted, 2 tons	6 · index 51%	1 · index 78%
Non-ducted, 2.5–3 tons	17 · index 53%	2 · index 69%
Non-ducted, 3.5–4.5 tons	8 · index 47%	2 · index 49%

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	1HVACCold-climate score, best model	KADENCold-climate score, best model
Ducted, up to 1.5 tons	86.9(50 is the typical model of its size class) (higher)ACIQ-18-HPBwith ducted air handler ACIQ-18W-WM8 of 9 models qualify · AHRI 213433229	52.0(50 is the typical model of its size class)KO-PS218HP-2AAMA1 of 3 models qualify · AHRI 211793561
Ducted, 2 tons	80.7(50 is the typical model of its size class) (higher)ACIQ-24ZPL-HP230Bwith ducted air handler ACIQ-24CD-HH-MB9 of 9 models qualify · AHRI 207825522	62.9(50 is the typical model of its size class)KO-UUS24HP-2AAMAwith ducted air handler KI-UUS24AHP-2AAMAAlso listed as KO-UUX24HP-2AAMA2 of 2 models qualify · AHRI 211793549
Ducted, 2.5–3 tons	79.9(50 is the typical model of its size class)ACIQ-36ZPL-HP230Bwith ducted air handler ACIQ-36CD-HH-MB14 of 19 models qualify · AHRI 210857301	None on this board (0 of 6 models qualify)
Ducted, 3.5–4.5 tons	86.4(50 is the typical model of its size class)ACIQ-48ZPL-HP230Bwith ducted air handler ACIQ-48CD-HH-MB14 of 22 models qualify · AHRI 210857302	None on this board (0 of 4 models qualify)
Ducted, 5 tons and up	No models in this size class	None on this board (0 of 2 models qualify)
Non-ducted, up to 1.5 tons	89.3(50 is the typical model of its size class)ACIQ-06ZPL-HP230Bwith ductless indoor unit ACIQ-06W-HH-MC11 of 21 models qualify · AHRI 210857294	89.3(50 is the typical model of its size class)KO-PSX06HP-2AAMAwith ductless indoor unit KI-PSX06WM-2AAMA2 of 7 models qualify · AHRI 213265556
Non-ducted, 2 tons	87.1(50 is the typical model of its size class) (higher)ACIQ-24ZPL-HP230Bwith ductless indoor unit ACIQ-24FM-HH-MB3 of 6 models qualify · AHRI 207825525	60.4(50 is the typical model of its size class)KO-PSX24HP-2AAMAwith ductless indoor unit KI-PSX24WM-2AAMA1 of 1 models qualify · AHRI 211793559
Non-ducted, 2.5–3 tons	79.3(50 is the typical model of its size class)ACIQ-36Z-HH-M4B9 of 17 models qualify · AHRI 207825570	None on this board (0 of 2 models qualify)
Non-ducted, 3.5–4.5 tons	76.8(50 is the typical model of its size class)ACIQ-60ZPL-HP230Bwith ductless indoor unit ACIQ-60FM-HH-MB5 of 8 models qualify · AHRI 210857306	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	1HVACAll-around score, best model	KADENAll-around score, best model
Ducted, up to 1.5 tons	85.2(50 is the typical model of its size class) (higher)ACIQ-09ZPL-HP230Bwith ducted air handler ACIQ-09CD-HH-MB9 of 9 models have all five ratings · AHRI 207825519	59.4(50 is the typical model of its size class)KO-PS218HP-2AAMA3 of 3 models have all five ratings · AHRI 211793561
Ducted, 2 tons	80.8(50 is the typical model of its size class) (higher)ACIQ-24ZPL-HP230Bwith ducted air handler ACIQ-24CD-HH-MB10 of 10 models have all five ratings · AHRI 207825522	52.0(50 is the typical model of its size class)KO-UUS24HP-2AAMAwith ducted air handler KI-UUS24AHP-2AAMAAlso listed as KO-UUX24HP-2AAMA2 of 2 models have all five ratings · AHRI 211793549
Ducted, 2.5–3 tons	75.4(50 is the typical model of its size class)HVH837GKA2with indoor coil EN(A,D,W)4X60L24+WALLCON and furnace 95CSU0802120A18 of 18 models have all five ratings · AHRI 210470878	75.4(50 is the typical model of its size class)KO-PS327HP-2AAMA6 of 6 models have all five ratings · AHRI 211793564
Ducted, 3.5–4.5 tons	82.0(50 is the typical model of its size class) (higher)ACIQ-48Z-HH-M5B21 of 21 models have all five ratings · AHRI 207825574	63.5(50 is the typical model of its size class)KO-PS548HP-2AAMA4 of 4 models have all five ratings · AHRI 211793568
Ducted, 5 tons and up	41.7(50 is the typical model of its size class)ACIQ-60-EHPBwith ducted air handler ACIQ-60AHB1 of 1 models have all five ratings · AHRI 213433223	41.7(50 is the typical model of its size class)KO-UUS60HP-2AAMAwith ducted air handler KI-UUS60AHU-2AAMAAlso listed as KO-UUX60HP-2AAMA2 of 2 models have all five ratings · AHRI 211793553
Non-ducted, up to 1.5 tons	92.0(50 is the typical model of its size class)ACIQ-06ZPL-HP230Bwith ductless indoor unit ACIQ-06W-HH-MC21 of 21 models have all five ratings · AHRI 210857294	92.0(50 is the typical model of its size class)KO-PSX06HP-2AAMAwith ductless indoor unit KI-PSX06WM-2AAMA7 of 7 models have all five ratings · AHRI 213265556
Non-ducted, 2 tons	84.3(50 is the typical model of its size class) (higher)ACIQ-24ZPL-HP230Bwith ductless indoor unit ACIQ-24W-HH-MC6 of 6 models have all five ratings · AHRI 210857298	77.5(50 is the typical model of its size class)KO-PSX24HP-2AAMAwith ductless indoor unit KI-PSX24WM-2AAMA1 of 1 models have all five ratings · AHRI 211793559
Non-ducted, 2.5–3 tons	82.8(50 is the typical model of its size class) (higher)ACIQ-36Z-HH-M4B15 of 17 models have all five ratings · AHRI 207825570	78.2(50 is the typical model of its size class)KO-PS327HP-2AAMA2 of 2 models have all five ratings · AHRI 211793563
Non-ducted, 3.5–4.5 tons	77.9(50 is the typical model of its size class) (higher)ACIQ-48Z-HH-M5B8 of 8 models have all five ratings · AHRI 207825573	56.1(50 is the typical model of its size class)KO-PS548HP-2AAMA2 of 2 models have all five ratings · AHRI 211793567

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	1HVAC	KADEN
COP at 5°F	beats 91% · 2.21ACIQ-24ZPL-HP230BNon-ducted, 2 tons	beats 97% · 2.39KO-PSX12HP-2AAMANon-ducted, up to 1.5 tons
Capacity retention at 5°F	beats 99% · 144%SC-09ZPL-HP230Non-ducted, up to 1.5 tons	beats 92% · 107%KO-PSX06HP-2AAMANon-ducted, up to 1.5 tons
HSPF2	beats 99% · 10.3ACIQ-48ZPL-HP230BDucted, 3.5–4.5 tons	beats 98% · 13.6KO-PSX06HP-2AAMANon-ducted, up to 1.5 tons
SEER2	beats 99% · 24.6ES-27Z-M3BNon-ducted, 2.5–3 tons	beats 99% · 24.6KO-PS327HP-2AAMANon-ducted, 2.5–3 tons
EER2	beats 99% · 16.6SC-09ZPL-HP230Non-ducted, up to 1.5 tons	beats 97% · 14.0KO-PSX24HP-2AAMANon-ducted, 2 tons
Heating capacity at 5°F	beats 99% · 56,500 Btu/hACIQ-60ZPL-HP230BNon-ducted, 3.5–4.5 tons	beats 79% · 13,100 Btu/hKO-PSX18HP-2AAMANon-ducted, up to 1.5 tons

More comparisons

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1HVAC vs KADEN heat pumps