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 KANIONco 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, 1HVAC scores higher on 6 of the 6 ratings.

1HVAC
KANIONco
Other ranked manufacturers

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

Average peer percentile, raw median and rank among ranked manufacturers
Rating	1HVAC	KANIONco
Efficiency index	61% (higher)median —	47% (higher)median —
COP at 5°F	57% (higher)median 2.00	37% (higher)median 1.83
Capacity retention at 5°F	59% (higher)median 78%	45% (higher)median 72%
HSPF2	71% (higher)median 10.0	50% (higher)median 9.5
SEER2	64% (higher)median 19.8	58% (higher)median 19.0
EER2	55% (higher)median 12.0	41% (higher)median 11.1
Heating capacity at 5°F	62% (higher)median 21,000 Btu/h	49% (higher)median 18,000 Btu/h
Outdoor models	70	56
AHRI certifications	166	60

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	1HVAC	KANIONco
CEE 2025 Tier 1 (Split ASHP)	87.1%61 models	66.1%37 models
CEE 2026 Tier 1 (Split ASHP)	85.7%60 models	66.1%37 models
CEE Advanced Tier (Split ASHP)	4.3%3 models	0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)	74.3%52 models	62.5%35 models
DOE Cold Climate Heat Pump Challenge	4.3%3 models	0%0 models
ENERGY STAR Cold Climate	77.1%54 models	35.7%20 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
KANIONco
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	KANIONco
Ducted, up to 1.5 tons	8 · index 75%	7 · index 23%
Ducted, 2 tons	8 · index 65%	4 · index 55%
Ducted, 2.5–3 tons	12 · index 65%	7 · index 57%
Ducted, 3.5–4.5 tons	17 · index 65%	10 · index 49%
Ducted, 5 tons and up	1 · index 63%	None
Non-ducted, up to 1.5 tons	22 · index 59%	19 · index 49%
Non-ducted, 2 tons	6 · index 53%	4 · index 40%
Non-ducted, 2.5–3 tons	9 · index 48%	6 · index 51%
Non-ducted, 3.5–4.5 tons	6 · index 53%	3 · index 51%
Non-ducted, 5 tons and up	1 · index 59%	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	1HVACCold-climate score, best model	KANIONcoCold-climate score, best model
Ducted, up to 1.5 tons	86.7(50 is the typical model of its size class) (higher)ACIQ-18-HPDwith ducted air handler ACIQ-18W-WMB7 of 8 models qualify · AHRI 216980821	57.7(50 is the typical model of its size class)KWSMO-18IR454BHS201 of 7 models qualify · AHRI 217048780
Ducted, 2 tons	85.7(50 is the typical model of its size class) (higher)ACIQ-24ZPL-HP230Cwith ducted air handler ACIQ-24CD-HH-MC8 of 8 models qualify · AHRI 216032281	67.2(50 is the typical model of its size class)KAHU-24IR454BHS20AEwith ducted air handler KAHU-24IR454BHS20AEAlso listed as KAHUO-24IR454BHS20AE3 of 4 models qualify · AHRI 218043597
Ducted, 2.5–3 tons	83.2(50 is the typical model of its size class) (higher)ACIQ-36ZPL-HP230Cwith ducted air handler ACIQ-36CD-HH-MC11 of 12 models qualify · AHRI 216032282	64.9(50 is the typical model of its size class)KAHU-36IR454BHS18AEwith ducted air handler KAHU-36IR454BHS18AEAlso listed as KAHUO-36IR454BHS18AE6 of 7 models qualify · AHRI 218043598
Ducted, 3.5–4.5 tons	85.1(50 is the typical model of its size class) (higher)ACIQ-60-HP32with ducted air handler ACIQ-60-AH3217 of 17 models qualify · AHRI 215387237	64.7(50 is the typical model of its size class)KAHU-60IR454BHS17AEwith ducted air handler KAHU-60IR454BHS17AEAlso listed as KAHUO-60IR454BHS17AE10 of 10 models qualify · AHRI 218043600
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	96.7(50 is the typical model of its size class) (higher)ACIQ-06ZPL-HP230Cwith ductless indoor unit ACIQ-06W-HH-MD14 of 22 models qualify · AHRI 216032267	70.9(50 is the typical model of its size class)KWSMO-18IR454BHS27R15 of 19 models qualify · AHRI 218396955
Non-ducted, 2 tons	89.4(50 is the typical model of its size class) (higher)ACIQ-24ZPL-HP230Cwith ductless indoor unit ACIQ-24CC-HH-MC4 of 6 models qualify · AHRI 216032275	58.0(50 is the typical model of its size class)KWSM-24IR454BHS22.5R*with ductless indoor unit KWSM-24IR454BHS22.5R2 of 4 models qualify · AHRI 218399921
Non-ducted, 2.5–3 tons	89.4(50 is the typical model of its size class) (higher)ACIQ-36ZPL-HP230Cwith ductless indoor unit ACIQ-36FM-HH-MD6 of 9 models qualify · AHRI 216032289	68.0(50 is the typical model of its size class)KWSMO-27IR454BHS26.5R4 of 6 models qualify · AHRI 218396956
Non-ducted, 3.5–4.5 tons	73.4(50 is the typical model of its size class) (higher)ACIQ-48Z-HH-M6C6 of 6 models qualify · AHRI 216032306	48.1(50 is the typical model of its size class)KWSMO-48IR454BHS24R3 of 3 models qualify · AHRI 218396958
Non-ducted, 5 tons and up	None on this board (0 of 1 models qualify)	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	1HVACAll-around score, best model	KANIONcoAll-around score, best model
Ducted, up to 1.5 tons	86.5(50 is the typical model of its size class) (higher)ACIQ-09ZPL-HP230Cwith ducted air handler ACIQ-09CD-HH-MC8 of 8 models have all five ratings · AHRI 216032278	69.0(50 is the typical model of its size class)KWSMO-18IR454BHS207 of 7 models have all five ratings · AHRI 217048780
Ducted, 2 tons	78.4(50 is the typical model of its size class)ACIQ-24ZPL-HP230Cwith ducted air handler ACIQ-24CD-HH-MC8 of 8 models have all five ratings · AHRI 216032281	79.6(50 is the typical model of its size class) (higher)KAHU-24IR454BHS20AEwith ducted air handler KAHU-24IR454BHS20AEAlso listed as KAHUO-24IR454BHS20AE4 of 4 models have all five ratings · AHRI 218043597
Ducted, 2.5–3 tons	83.6(50 is the typical model of its size class) (higher)ACIQ-36Z-HH-M5C12 of 12 models have all five ratings · AHRI 216032302	69.9(50 is the typical model of its size class)KWSMO-27IR454BHS207 of 7 models have all five ratings · AHRI 217048781
Ducted, 3.5–4.5 tons	85.1(50 is the typical model of its size class) (higher)ES-48Z-M6C17 of 17 models have all five ratings · AHRI 216032320	67.5(50 is the typical model of its size class)KWSMO-42IR454BHS1910 of 10 models have all five ratings · AHRI 217048783
Ducted, 5 tons and up	62.5(50 is the typical model of its size class)ES-55Z-M6C1 of 1 models have all five ratings · AHRI 216032323	No models in this size class
Non-ducted, up to 1.5 tons	96.2(50 is the typical model of its size class) (higher)ACIQ-06ZPL-HP230Cwith ductless indoor unit ACIQ-06W-HH-MD22 of 22 models have all five ratings · AHRI 216032267	82.6(50 is the typical model of its size class)KWSMO-18IR454BHS27R19 of 19 models have all five ratings · AHRI 218396955
Non-ducted, 2 tons	76.4(50 is the typical model of its size class) (higher)ACIQ-24ZPL-HP230Cwith ductless indoor unit ACIQ-24W-HH-MD6 of 6 models have all five ratings · AHRI 216032271	56.1(50 is the typical model of its size class)KWSM-24IR454BHS22.5R*with ductless indoor unit KWSM-24IR454BHS22.5R4 of 4 models have all five ratings · AHRI 218399921
Non-ducted, 2.5–3 tons	78.3(50 is the typical model of its size class)ACIQ-36Z-HH-M5C9 of 9 models have all five ratings · AHRI 216032301	83.1(50 is the typical model of its size class) (higher)KWSMO-27IR454BHS26.5R6 of 6 models have all five ratings · AHRI 218396956
Non-ducted, 3.5–4.5 tons	75.6(50 is the typical model of its size class) (higher)ACIQ-48Z-HH-M6C6 of 6 models have all five ratings · AHRI 216032304	70.2(50 is the typical model of its size class)KWSMO-48IR454BHS24R3 of 3 models have all five ratings · AHRI 218396958
Non-ducted, 5 tons and up	58.6(50 is the typical model of its size class)ES-55Z-M6C1 of 1 models have all five ratings · AHRI 216032322	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	1HVAC	KANIONco
COP at 5°F	beats 98% · 2.44EZ-18ZPL-HP230BNon-ducted, up to 1.5 tons	beats 81% · 2.03KWSM-36IR454BHS19PNon-ducted, 2.5–3 tons
Capacity retention at 5°F	beats 98% · 126%ACIQ-09ZPL-HP230CNon-ducted, up to 1.5 tons	beats 92% · 106%KWSM-09IR454BHS25RNon-ducted, up to 1.5 tons
HSPF2	beats 99% · 14.8ACIQ-06ZPL-HP230CNon-ducted, up to 1.5 tons	beats 80% · 10.5KWSMO-27IR454BHS20Non-ducted, 2.5–3 tons
SEER2	beats 97% · 25.0ES-27Z-M4CNon-ducted, 2.5–3 tons	beats 99% · 26.5KWSMO-27IR454BHS26.5RNon-ducted, 2.5–3 tons
EER2	beats 99% · 18.0ACIQ-06ZPL-HP230CNon-ducted, up to 1.5 tons	beats 97% · 14.0KWSMO-27IR454BHS26.5RNon-ducted, 2.5–3 tons
Heating capacity at 5°F	beats 98% · 19,600 Btu/hACIQ-18-HPDDucted, up to 1.5 tons	beats 98% · 19,800 Btu/hKWSMO-18IR454BHS27RNon-ducted, up to 1.5 tons

More comparisons

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1HVAC vs KANIONco heat pumps