LG heat pump efficiency: 100 outdoor models compared

LG has 100 heat pump outdoor models certified with this refrigerant group, in 1,179 AHRI-certified combinations. Each model is compared with models of the same size and duct type, so the scores below do not depend on which sizes LG makes. Ranks are among manufacturers with a QMID on file and at least 10 scored models.

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ManufacturerData as of Oct 11, 2026updated Oct 11, 2026 · sources

Outdoor models: 100
AHRI certifications: 1,179
Efficiency index: 56%; Typical model vs same-size, same-type peers (131 models)
Meet CEE 2025: 86%; 86 models

How LG compares with comparable models

For each rating: the share of same-size, same-type models that a typical model of this manufacturer beats (50% is typical), its rank, and the raw median for context. Raw medians are not comparable across manufacturers that make different sizes.

LG against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of LG’s own modelsLG is strongest on EER2 (its typical model beats 64% of comparable models) and weakest on SEER2 (49%).

LG
Middle half of its models
Other ranked manufacturers

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

Average peer percentile of LG’s models
Rating	Beats comparable models	Rank	Raw median
Efficiency index131 models scored	56%	10th of 29	—
COP at 5°F131 models scored	56%	17th of 29	1.96
Capacity retention at 5°F131 models scored	57%	9th of 29	74%
HSPF2131 models scored	51%	14th of 29	9.0
SEER2131 models scored	49%	17th of 29	20.0
EER2131 models scored	64%	4th of 29	12.3
Heating capacity at 5°F131 models scored	61%	7th of 29	15,550 Btu/h

Standards met

Share of LG’s models with at least one qualifying certification
Standard	Share	Models
CEE 2025 Tier 1 (Split ASHP)	86%	86
CEE 2026 Tier 1 (Split ASHP)	82%	82
CEE Advanced Tier (Split ASHP)	11%	11
Xcel Energy Colorado cold-climate ASHP (2025)	78%	78
DOE Cold Climate Heat Pump Challenge	11%	11
ENERGY STAR Cold Climate	64%	64

Sizes and duct types offered

Models per peer group, and how they score against the other models of that group.

LG’s models inside each size and duct typeShape: every model of the group · blue: the middle half of this manufacturer’s models there, median dot, 10th–90th percentile line

LG (median, middle 50%, 10th–90th)
All models of the group

Source: AHRI Directory · as of Oct 11, 2026

Share of comparable models beaten, per peer group
Size and duct type	Models	Index	COP@5°F	HSPF2	SEER2
Ducted, up to 1.5 tons	12	54%	79%	43%	47%
Ducted, 2 tons	9	53%	71%	55%	47%
Ducted, 2.5–3 tons	11	62%	78%	65%	55%
Ducted, 3.5–4.5 tons	16	66%	64%	72%	66%
Ducted, 5 tons and up	2	81%	72%	83%	81%
Non-ducted, up to 1.5 tons	44	46%	33%	40%	40%
Non-ducted, 2 tons	14	50%	37%	42%	43%
Non-ducted, 2.5–3 tons	12	63%	71%	52%	57%
Non-ducted, 3.5–4.5 tons	10	69%	79%	59%	50%
Non-ducted, 5 tons and up	1	85%	58%	71%	99%

Every LG model in the market

LG’s 131 models with a known size and duct type, over the shape of the whole catalog.

LG models by size and ratingColoured: LG · grey shapes: all 14,508 models · lines: catalog medians by size

LG models
Ducted median by size
Non-ducted median by size
Every model at each size (width = count)
Standard threshold

Dots: 131 lg models, each through its representative certification, in the colour of the rating shown. The grey shapes count all 14,508 models, half a ton at a time.

Show the data as a table

COP at 5°F by size and duct type (every model, by rated cooling capacity)
Duct type, size	Models	10th pct.	25th	Median	75th	90th
Ducted, 0.5 tons	826	1.64	1.71	1.75	1.85	2.24
Ducted, 1 ton	407	1.80	1.90	2.05	2.41	2.45
Ducted, 1.5 tons	992	1.75	1.86	2.00	2.17	2.40
Ducted, 2 tons	999	1.75	1.86	2.00	2.18	2.30
Ducted, 2.5 tons	1,040	1.70	1.80	2.00	2.10	2.36
Ducted, 3 tons	696	1.80	1.90	2.00	2.10	2.42
Ducted, 3.5 tons	865	1.70	1.80	2.00	2.10	2.46
Ducted, 4 tons	726	1.80	1.86	2.00	2.12	2.41
Ducted, 4.5 tons	690	1.70	1.80	1.90	2.10	2.20
Ducted, 5 tons	86	1.89	2.00	2.10	2.10	2.10
Non-ducted, 0.5 tons	1,186	1.75	1.80	1.90	2.00	2.22
Non-ducted, 1 ton	1,343	1.80	1.80	1.99	2.10	2.21
Non-ducted, 1.5 tons	1,261	1.80	1.80	2.00	2.10	2.31
Non-ducted, 2 tons	761	1.80	1.98	2.00	2.10	2.30
Non-ducted, 2.5 tons	403	1.80	1.85	2.00	2.00	2.10
Non-ducted, 3 tons	473	1.90	1.98	2.00	2.03	2.20
Non-ducted, 3.5 tons	280	2.00	2.00	2.00	2.05	2.10
Non-ducted, 4 tons	204	1.96	2.00	2.05	2.10	2.11
Non-ducted, 4.5 tons	78	1.90	1.91	1.95	2.01	2.01
Non-ducted, 5 tons	84	1.99	2.00	2.05	2.20	2.20

Source: AHRI Directory · as of Oct 11, 2026

Top LG models

Its top five cold-climate picks and its top five all-around models across sizes (both scores compare each model with models of its own size and duct type, so sizes compare), then, on each single rating, the model that beats the largest share of comparable models.

Cold-climate picks

Top 5 LG cold-climate picks across sizes. 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.
# · Outdoor model	Size · type	Cap. 5/47	COP@5°F	HSPF2	Btu/h @5°F	SEER2	Meets	Combos	AHRI ref.	Compared with	Score
1KUMXA421ALG · KUMXA421A	3.5 tons42,000 Btu/h · Non-ducted	100%	2.29	11.0	48,000	21.5	CEE 25CEE 26CEE AdvXcelDOEES CC	3	215402347	Non-ducted, 3.5–4.5 tons	95.9
2KUMXB601ALG · KUMXB601A	5 tons60,000 Btu/h · Ducted	82%	2.33	9.5	52,500	18.5	CEE 25CEE 26Xcel	3	215402344	Ducted, 5 tons and up	94.6
3KUMXA361ALG · KUMXA361A	3 tons36,000 Btu/h · Non-ducted	100%	2.27	11.0	45,000	22.0	CEE 25CEE 26CEE AdvXcelDOEES CC	3	215402345	Non-ducted, 2.5–3 tons	93.7
4KUMXA481ALG · KUMXA481A	4 tons48,000 Btu/h · Ducted	100%	2.33	10.0	52,500	18.5	CEE 25CEE 26CEE AdvXcelDOEES CC	3	215408637	Ducted, 3.5–4.5 tons	90.4
5ZRUM036GSS0LG · ZRUM036GSS0	3 tons36,000 Btu/h · Non-ducted	100%	2.30	10.6	42,000	23.0	CEE 25CEE 26CEE AdvXcelDOEES CC	3	214914950	Non-ducted, 2.5–3 tons	89.8

All-around best

Top 5 LG models on the all-around score across sizes. 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.
# · Outdoor model	Size · type	Cap. 5/47	COP@5°F	HSPF2	SEER2	EER2	Meets	Combos	AHRI ref.	Compared with	Score	Heating half	Cooling half	Cold-climate score
1KUSAL091ALG · KUSAL091Awith ductless indoor unit KNSAL091A	1 ton9,000 Btu/h · Non-ducted	109%	2.04	13.5	27.0	15.8	CEE 25CEE 26XcelES CC	1	216368959	Non-ducted, up to 1.5 tons	91.4	86.8	95.9	86.8
2KUMXA421ALG · KUMXA421A	3.5 tons42,000 Btu/h · Ducted	100%	2.27	10.0	19.0	13.1	CEE 25CEE 26CEE AdvXcelDOEES CC	3	215402348	Ducted, 3.5–4.5 tons	91.2	89.3	93.0	89.3
3KUSXA301ALG · KUSXA301Awith ductless indoor unit KNSCB301A	2.5 tons30,000 Btu/h · Non-ducted	100%	2.10	10.4	25.0	15.2	CEE 25CEE 26CEE AdvXcelDOEES CC	62	214826535	Non-ducted, 2.5–3 tons	90.3	82.3	98.2	82.3
4KUMXA481ALG · KUMXA481A	4 tons48,000 Btu/h · Ducted	100%	2.33	10.0	18.5	12.6	CEE 25CEE 26CEE AdvXcelDOEES CC	3	215408637	Ducted, 3.5–4.5 tons	90.1	90.4	89.9	90.4
5KUMXB601ALG · KUMXB601A	5 tons60,000 Btu/h · Ducted	82%	2.33	9.5	18.5	11.7	CEE 25CEE 26Xcel	3	215402344	Ducted, 5 tons and up	89.5	94.6	84.4	94.6

Best model on each rating

LG’s model with the highest peer percentile on each rating, ranked by that one rating only
Rating	Model	Value	Compared with	Beats	AHRI ref.
COP at 5°F	KUSXB181A	3.17	Ducted, up to 1.5 tons	100%	217198647
Capacity retention at 5°F	KUSXA181A	137%	Ducted, up to 1.5 tons	100%	217581954
HSPF2	KUSAL091A	13.5	Non-ducted, up to 1.5 tons	97%	216368959
SEER2	ZRUM060GSS0	23.0	Non-ducted, 5 tons and up	98%	214914943
EER2	ZRUN024GSS0	14.8	Ducted, 2 tons	100%	214914956
Heating capacity at 5°F	KUSXA181A	25,000 Btu/h	Ducted, up to 1.5 tons	100%	215588567

All 100 LG models in Explore

LG size class by size class: cold-climate and all-around

Its best model on each board in every size and duct type it makes. Both scores are 0–100 against every model of that size class (the line on each bar is 50, the typical model there). Cold-climate picks must keep at least 70% of their heat at 5°F; the all-around score needs all five ratings and has no such bar.

LG: best cold-climate pick and best all-around model per size and duct type, with how many of its models are on each board (top 5 and 5 per class are in the snapshot)
Size and duct type	Cold-climate pickCold-climate score, best model	All-around bestAll-around score, best model
Ducted, up to 1.5 tons	80.4(50 is the typical model of its size class)KUSXA181Awith ducted air handler MSVT24***852FAA10 of 10 models qualify · AHRI 217581954	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	78.1(50 is the typical model of its size class)ZRUN024GSS010 of 10 models qualify · AHRI 214914956	79.5(50 is the typical model of its size class)ZRUN024GSS08 of 8 models have all five ratings · AHRI 214914956
Ducted, 2.5–3 tons	87.4(50 is the typical model of its size class)ZRUM036GSS010 of 10 models qualify · AHRI 214914952	89.3(50 is the typical model of its size class)KUMXA361A12 of 12 models have all five ratings · AHRI 215402346
Ducted, 3.5–4.5 tons	90.4(50 is the typical model of its size class)KUMXA481A18 of 18 models qualify · AHRI 215408637	91.2(50 is the typical model of its size class)KUMXA421A18 of 18 models have all five ratings · AHRI 215402348
Ducted, 5 tons and up	94.6(50 is the typical model of its size class)KUMXB601A2 of 2 models qualify · AHRI 215402344	89.5(50 is the typical model of its size class)KUMXB601A2 of 2 models have all five ratings · AHRI 215402344
Non-ducted, up to 1.5 tons	86.8(50 is the typical model of its size class)KUSAL091Awith ductless indoor unit KNSAL091A44 of 44 models qualify · AHRI 216368959	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	85.4(50 is the typical model of its size class)ZRUN024GSS07 of 14 models qualify · AHRI 215223214	77.2(50 is the typical model of its size class)ZRUN024GSS014 of 14 models have all five ratings · AHRI 214914954
Non-ducted, 2.5–3 tons	93.7(50 is the typical model of its size class)KUMXA361A12 of 12 models qualify · AHRI 215402345	90.3(50 is the typical model of its size class)KUSXA301Awith ductless indoor unit KNSCB301A12 of 12 models have all five ratings · AHRI 214826535
Non-ducted, 3.5–4.5 tons	95.9(50 is the typical model of its size class)KUMXA421A8 of 9 models qualify · AHRI 215402347	89.3(50 is the typical model of its size class)KUMXA421A9 of 9 models have all five ratings · AHRI 215402347
Non-ducted, 5 tons and up	84.7(50 is the typical model of its size class)KUMXB601A2 of 2 models qualify · AHRI 215408633	85.4(50 is the typical model of its size class)ZRUM060GSS02 of 2 models have all five ratings · AHRI 214914943

All-around board, every manufacturer

Newest LG certifications

By AHRI reference number; AHRI issues references in increasing order.

The 5 most recently certified LG outdoor models
Outdoor model	Size · type	COP@5°F	Cap. 5/47	HSPF2	SEER2	Meets	Combos	AHRI ref.
KUSXE361ALGwith ducted air handler SM5*37+TXV	2.5 tons30,400 Btu/h · Ducted	1.92	63%	8.1	16.0	CEE 25	81	218814755
KUSXE241ALGwith ducted air handler CE2505C*+TXV	1.5 tons17,000 Btu/h · Ducted	2.10	67%	8.5	15.2	CEE 25	87	218792155
KUSXE181ALGwith ducted air handler CE2403C*+TXV	1 ton14,600 Btu/h · Ducted	1.88	54%	7.5	16.0	CEE 25	24	218792150
KUSXE301ALGwith ducted air handler CE3005C*+TXV	2.5 tons27,400 Btu/h · Ducted	2.00	54%	8.0	16.0	CEE 25	30	218792141
KUSXB301ALGwith ducted air handler CE3005A*+TXV	2 tons26,000 Btu/h · Ducted and non-ducted	1.72	—	8.7	17.0	CEE 25CEE 26XcelES CC	88	218775081

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LG includes these brand names as listed in AHRI: LG. Standards are checked against published thresholds; program rules beyond ratings are not checked.