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 LG 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 5 of the 6 ratings.

1HVAC
LG
Other ranked manufacturers

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

Average peer percentile, raw median and rank among ranked manufacturers
Rating	1HVAC	LG
Efficiency index	61% (higher)median —	56% (higher)median — · 10th ranked
COP at 5°F	57% (higher)median 2.00	56% (higher)median 1.96 · 17th ranked
Capacity retention at 5°F	59% (higher)median 78%	57% (higher)median 74% · 9th ranked
HSPF2	71% (higher)median 10.0	51% (higher)median 9.0 · 14th ranked
SEER2	64% (higher)median 19.8	49% (higher)median 20.0 · 17th ranked
EER2	55%median 12.0	64%median 12.3 · 4th ranked
Heating capacity at 5°F	62% (higher)median 21,000 Btu/h	61% (higher)median 15,550 Btu/h · 7th ranked
Outdoor models	70	100
AHRI certifications	166	1,179

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	1HVAC	LG
CEE 2025 Tier 1 (Split ASHP)	87.1%61 models	86%86 models
CEE 2026 Tier 1 (Split ASHP)	85.7%60 models	82%82 models
CEE Advanced Tier (Split ASHP)	4.3%3 models	11%11 models
Xcel Energy Colorado cold-climate ASHP (2025)	74.3%52 models	78%78 models
DOE Cold Climate Heat Pump Challenge	4.3%3 models	11%11 models
ENERGY STAR Cold Climate	77.1%54 models	64%64 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 · 10 groups where both have models

1HVAC
LG
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	LG
Ducted, up to 1.5 tons	8 · index 75%	12 · index 54%
Ducted, 2 tons	8 · index 65%	9 · index 53%
Ducted, 2.5–3 tons	12 · index 65%	11 · index 62%
Ducted, 3.5–4.5 tons	17 · index 65%	16 · index 66%
Ducted, 5 tons and up	1 · index 63%	2 · index 81%
Non-ducted, up to 1.5 tons	22 · index 59%	44 · index 46%
Non-ducted, 2 tons	6 · index 53%	14 · index 50%
Non-ducted, 2.5–3 tons	9 · index 48%	12 · index 63%
Non-ducted, 3.5–4.5 tons	6 · index 53%	10 · index 69%
Non-ducted, 5 tons and up	1 · index 59%	1 · index 85%

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	LGCold-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	80.4(50 is the typical model of its size class)KUSXA181Awith ducted air handler MSVT24***852FAA10 of 10 models qualify · AHRI 217581954
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	78.1(50 is the typical model of its size class)ZRUN024GSS010 of 10 models qualify · AHRI 214914956
Ducted, 2.5–3 tons	83.2(50 is the typical model of its size class)ACIQ-36ZPL-HP230Cwith ducted air handler ACIQ-36CD-HH-MC11 of 12 models qualify · AHRI 216032282	87.4(50 is the typical model of its size class) (higher)ZRUM036GSS010 of 10 models qualify · AHRI 214914952
Ducted, 3.5–4.5 tons	85.1(50 is the typical model of its size class)ACIQ-60-HP32with ducted air handler ACIQ-60-AH3217 of 17 models qualify · AHRI 215387237	90.4(50 is the typical model of its size class) (higher)KUMXA481A18 of 18 models qualify · AHRI 215408637
Ducted, 5 tons and up	None on this board (0 of 1 models qualify)	94.6(50 is the typical model of its size class)KUMXB601A2 of 2 models qualify · AHRI 215402344
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	86.8(50 is the typical model of its size class)KUSAL091Awith ductless indoor unit KNSAL091A44 of 44 models qualify · AHRI 216368959
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	85.4(50 is the typical model of its size class)ZRUN024GSS07 of 14 models qualify · AHRI 215223214
Non-ducted, 2.5–3 tons	89.4(50 is the typical model of its size class)ACIQ-36ZPL-HP230Cwith ductless indoor unit ACIQ-36FM-HH-MD6 of 9 models qualify · AHRI 216032289	93.7(50 is the typical model of its size class) (higher)KUMXA361A12 of 12 models qualify · AHRI 215402345
Non-ducted, 3.5–4.5 tons	73.4(50 is the typical model of its size class)ACIQ-48Z-HH-M6C6 of 6 models qualify · AHRI 216032306	95.9(50 is the typical model of its size class) (higher)KUMXA421A8 of 9 models qualify · AHRI 215402347
Non-ducted, 5 tons and up	None on this board (0 of 1 models qualify)	84.7(50 is the typical model of its size class)KUMXB601A2 of 2 models qualify · AHRI 215408633

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	LGAll-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	78.7(50 is the typical model of its size class)KUSXA181Awith ducted air handler MSVT24***852FAA10 of 10 models have all five ratings · AHRI 217581954
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	79.5(50 is the typical model of its size class) (higher)ZRUN024GSS08 of 8 models have all five ratings · AHRI 214914956
Ducted, 2.5–3 tons	83.6(50 is the typical model of its size class)ACIQ-36Z-HH-M5C12 of 12 models have all five ratings · AHRI 216032302	89.3(50 is the typical model of its size class) (higher)KUMXA361A12 of 12 models have all five ratings · AHRI 215402346
Ducted, 3.5–4.5 tons	85.1(50 is the typical model of its size class)ES-48Z-M6C17 of 17 models have all five ratings · AHRI 216032320	91.2(50 is the typical model of its size class) (higher)KUMXA421A18 of 18 models have all five ratings · AHRI 215402348
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	89.5(50 is the typical model of its size class) (higher)KUMXB601A2 of 2 models have all five ratings · AHRI 215402344
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	91.4(50 is the typical model of its size class)KUSAL091Awith ductless indoor unit KNSAL091A44 of 44 models have all five ratings · AHRI 216368959
Non-ducted, 2 tons	76.4(50 is the typical model of its size class)ACIQ-24ZPL-HP230Cwith ductless indoor unit ACIQ-24W-HH-MD6 of 6 models have all five ratings · AHRI 216032271	77.2(50 is the typical model of its size class) (higher)ZRUN024GSS014 of 14 models have all five ratings · AHRI 214914954
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	90.3(50 is the typical model of its size class) (higher)KUSXA301Awith ductless indoor unit KNSCB301A12 of 12 models have all five ratings · AHRI 214826535
Non-ducted, 3.5–4.5 tons	75.6(50 is the typical model of its size class)ACIQ-48Z-HH-M6C6 of 6 models have all five ratings · AHRI 216032304	89.3(50 is the typical model of its size class) (higher)KUMXA421A9 of 9 models have all five ratings · AHRI 215402347
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	85.4(50 is the typical model of its size class) (higher)ZRUM060GSS02 of 2 models have all five ratings · AHRI 214914943

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	LG
COP at 5°F	beats 98% · 2.44EZ-18ZPL-HP230BNon-ducted, up to 1.5 tons	beats 100% · 3.17KUSXB181ADucted, up to 1.5 tons
Capacity retention at 5°F	beats 98% · 126%ACIQ-09ZPL-HP230CNon-ducted, up to 1.5 tons	beats 100% · 137%KUSXA181ADucted, up to 1.5 tons
HSPF2	beats 99% · 14.8ACIQ-06ZPL-HP230CNon-ducted, up to 1.5 tons	beats 97% · 13.5KUSAL091ANon-ducted, up to 1.5 tons
SEER2	beats 97% · 25.0ES-27Z-M4CNon-ducted, 2.5–3 tons	beats 98% · 23.0ZRUM060GSS0Non-ducted, 5 tons and up
EER2	beats 99% · 18.0ACIQ-06ZPL-HP230CNon-ducted, up to 1.5 tons	beats 100% · 14.8ZRUN024GSS0Ducted, 2 tons
Heating capacity at 5°F	beats 98% · 19,600 Btu/hACIQ-18-HPDDucted, up to 1.5 tons	beats 100% · 25,000 Btu/hKUSXA181ADucted, up to 1.5 tons

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1HVAC vs LG heat pumps