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Best mid-capacity mini-split heat pumps, ranked on official ENERGY STAR specs
Ductless mini-split heat pumps whose official ENERGY STAR cooling capacity is 12,001 to 24,000 Btu/h, compared on the official certified mini-split record. We score official SEER2, official HSPF2, official EER2 and official COP at 5°F. Missing official fields are shown as Not listed and score at the category minimum. Official ratings are for the certified outdoor and indoor combination shown. Rebadged official model numbers with identical scored fields share one page.
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Top pick
F
Fujitsu AIRSTAGE H-Series (AOUH15KTAP1)
Score 9.6/10 · Check price
Why it wins: Official 14,500 Btu/h official cooling, 28.7 official SEER2. Official ENERGY STAR record lists 28.7 SEER2.. Official ENERGY STAR record lists 13 HSPF2..
"Not listed" means the official manufacturer specification table we used does not publish that figure. Prices show "Check price" until a retailer feed provides a current price.
A ductless mini-split heat pump uses refrigerant under pressure and a dedicated high-voltage circuit. Installation, line-set work, vacuum, and refrigerant charging should be done by an EPA Section 608 certified HVAC technician following the maker's instructions, the National Electrical Code, and local rules. Several official refrigerants in this catalog, including R-32 and R-454B, are mildly flammable (A2L); do not attempt a refrigerant DIY install. Leave required outdoor clearances, slope the condensate drain, and use a disconnect at the outdoor unit. Official cooling and heating capacities are certified combination ratings, not a guarantee that a unit will heat or cool a given room — size the system with a load calculation. Confirm the current official specification, the indoor head type, and the line-set limits with the maker and the installer before you buy.
Best for: Official 18,000 Btu/h official cooling, 27 official SEER2
8.5/10
What we like
Official ENERGY STAR record lists 27 SEER2.
Official ENERGY STAR record lists 11 HSPF2.
Official ENERGY STAR record lists a COP at 5°F of 2.6.
Official ENERGY STAR record lists a cold-climate designation.
Watch out for
Official ratings are for the certified outdoor and indoor combination shown; a different official indoor head can change the certified figures.
Score breakdown
Official SEER230%
Official HSPF225%
Official EER220%
Official COP at 5°F25%
Official SEER2
27
Official HSPF2
11
Official EER2
15
Official COP at 5°F
2.6
Official ENERGY STAR unique ID
4,429,034
Official outdoor unit model number
PAS-18BUFASDQ1-LAC
Official indoor unit model number
PCI-B18UFA1DQ
Official series name
airCore700
Official product type
HP - Mini or Multi Split
Official cooling capacity
18,000 Btu/h
Official heating capacity at 47°F
18,000 Btu/h
Official heating capacity at 17°F
17,000 Btu/h
Official heating capacity at 5°F
15,000 Btu/h
Official cold-climate designation
Yes
Official ENERGY STAR Most Efficient 2025
Yes
Official refrigerant type
R-32
Official AHRI reference number
217450776
Other official indoor models listed with this outdoor unit
PPK-B18UFA1DQ, PPFC-B18UFA1DQ, PPIM-B18UFA1DQ
Official ENERGY STAR date certified
03/26/2026
Source-data note
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
Best for: Official 19,000 Btu/h official cooling, 27 official SEER2
7.6/10
What we like
Official ENERGY STAR record lists 27 SEER2.
Official ENERGY STAR record lists 11 HSPF2.
Official ENERGY STAR record lists a cold-climate designation.
Watch out for
Official ratings are for the certified outdoor and indoor combination shown; a different official indoor head can change the certified figures.
Score breakdown
Official SEER230%
Official HSPF225%
Official EER220%
Official COP at 5°F25%
Official SEER2
27
Official HSPF2
11
Official EER2
16
Official COP at 5°F
2.1
Official ENERGY STAR unique ID
4,573,061
Official outdoor unit model number
MST183G32MHAA
Official indoor unit model number
Not listed
Official series name
MST Series
Official product type
HP - Mini or Multi Split
Official cooling capacity
19,000 Btu/h
Official heating capacity at 47°F
20,000 Btu/h
Official heating capacity at 17°F
20,800 Btu/h
Official heating capacity at 5°F
20,000 Btu/h
Official cold-climate designation
Yes
Official ENERGY STAR Most Efficient 2025
Yes
Official refrigerant type
R-32
Official AHRI reference number
218083366
Official ENERGY STAR date certified
05/12/2026
Source-data note
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
Best for: Official 24,000 Btu/h official cooling, 26 official SEER2
7.4/10
What we like
Official ENERGY STAR record lists 26 SEER2.
Official ENERGY STAR record lists 10.7 HSPF2.
Official ENERGY STAR record lists a cold-climate designation.
Watch out for
Official ratings are for the certified outdoor and indoor combination shown; a different official indoor head can change the certified figures.
Score breakdown
Official SEER230%
Official HSPF225%
Official EER220%
Official COP at 5°F25%
Official SEER2
26
Official HSPF2
10.7
Official EER2
17
Official COP at 5°F
2.18
Official ENERGY STAR unique ID
4,691,443
Official outdoor unit model number
AM024HCMDCG
Official indoor unit model number
Not listed
Official series name
DVM S Mini
Official product type
HP - Mini or Multi Split
Official cooling capacity
24,000 Btu/h
Official heating capacity at 47°F
27,000 Btu/h
Official heating capacity at 17°F
18,000 Btu/h
Official heating capacity at 5°F
24,000 Btu/h
Official cold-climate designation
Yes
Official ENERGY STAR Most Efficient 2025
Yes
Official refrigerant type
R-32
Official AHRI reference number
218717190
Official ENERGY STAR date certified
08/20/2026
Source-data note
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
Best for: Official 18,000 Btu/h official cooling, 25.1 official SEER2
6.4/10
What we like
Official ENERGY STAR record lists 25.1 SEER2.
Official ENERGY STAR record lists a COP at 5°F of 2.3.
Official ENERGY STAR record lists a cold-climate designation.
Watch out for
Official ratings are for the certified outdoor and indoor combination shown; a different official indoor head can change the certified figures.
Score breakdown
Official SEER230%
Official HSPF225%
Official EER220%
Official COP at 5°F25%
Official SEER2
25.1
Official HSPF2
9.8
Official EER2
14
Official COP at 5°F
2.3
Official ENERGY STAR unique ID
3,723,357
Official outdoor unit model number
ES-18Z-M3C
Official indoor unit model number
Not listed
Official series name
ES Series
Official product type
HP - Mini or Multi Split
Official cooling capacity
18,000 Btu/h
Official heating capacity at 47°F
19,000 Btu/h
Official heating capacity at 17°F
16,000 Btu/h
Official heating capacity at 5°F
13,500 Btu/h
Official cold-climate designation
Yes
Official ENERGY STAR Most Efficient 2025
Yes
Official refrigerant type
R-454B
Official AHRI reference number
216032376
Also certified under official brand or model listings
1HVAC ES-18Z-M3C
Official ENERGY STAR date certified
05/06/2026
Source-data note
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
Best for: Official 18,000 Btu/h official cooling, 25.1 official SEER2
6.4/10
What we like
Official ENERGY STAR record lists 25.1 SEER2.
Official ENERGY STAR record lists a COP at 5°F of 2.3.
Official ENERGY STAR record lists a cold-climate designation.
Watch out for
Official ratings are for the certified outdoor and indoor combination shown; a different official indoor head can change the certified figures.
Score breakdown
Official SEER230%
Official HSPF225%
Official EER220%
Official COP at 5°F25%
Official SEER2
25.1
Official HSPF2
9.8
Official EER2
14
Official COP at 5°F
2.3
Official ENERGY STAR unique ID
3,554,581
Official outdoor unit model number
BMS500-AAM018-1CSXRD
Official indoor unit model number
Not listed
Official series name
BMS Series
Official product type
HP - Mini or Multi Split
Official cooling capacity
18,000 Btu/h
Official heating capacity at 47°F
19,000 Btu/h
Official heating capacity at 17°F
16,000 Btu/h
Official heating capacity at 5°F
13,500 Btu/h
Official cold-climate designation
Yes
Official ENERGY STAR Most Efficient 2025
Yes
Official refrigerant type
R-454B
Official AHRI reference number
215223328
Official indoor unit brand
BOSCH
Official ENERGY STAR date certified
05/06/2026
Source-data note
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
Best for: Official 18,000 Btu/h official cooling, 25.1 official SEER2
6.4/10
What we like
Official ENERGY STAR record lists 25.1 SEER2.
Official ENERGY STAR record lists a COP at 5°F of 2.3.
Official ENERGY STAR record lists a cold-climate designation.
Watch out for
Official ratings are for the certified outdoor and indoor combination shown; a different official indoor head can change the certified figures.
Score breakdown
Official SEER230%
Official HSPF225%
Official EER220%
Official COP at 5°F25%
Official SEER2
25.1
Official HSPF2
9.8
Official EER2
14
Official COP at 5°F
2.3
Official ENERGY STAR unique ID
3,712,405
Official outdoor unit model number
CH-R18MES-230VO
Official indoor unit model number
Not listed
Official series name
CH Series
Official product type
HP - Mini or Multi Split
Official cooling capacity
18,000 Btu/h
Official heating capacity at 47°F
19,000 Btu/h
Official heating capacity at 17°F
16,000 Btu/h
Official heating capacity at 5°F
13,500 Btu/h
Official cold-climate designation
Yes
Official ENERGY STAR Most Efficient 2025
Yes
Official refrigerant type
R-454B
Official AHRI reference number
215864254
Official ENERGY STAR date certified
05/06/2026
Source-data note
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
Best for: Official 18,000 Btu/h official cooling, 25.1 official SEER2
6.4/10
What we like
Official ENERGY STAR record lists 25.1 SEER2.
Official ENERGY STAR record lists a COP at 5°F of 2.3.
Official ENERGY STAR record lists a cold-climate designation.
Watch out for
Official ratings are for the certified outdoor and indoor combination shown; a different official indoor head can change the certified figures.
Score breakdown
Official SEER230%
Official HSPF225%
Official EER220%
Official COP at 5°F25%
Official SEER2
25.1
Official HSPF2
9.8
Official EER2
14
Official COP at 5°F
2.3
Official ENERGY STAR unique ID
4,016,548
Official outdoor unit model number
MULTI3-18HP230C-O
Official indoor unit model number
Not listed
Official series name
MULTI Series
Official product type
HP - Mini or Multi Split
Official cooling capacity
18,000 Btu/h
Official heating capacity at 47°F
19,000 Btu/h
Official heating capacity at 17°F
16,000 Btu/h
Official heating capacity at 5°F
13,500 Btu/h
Official cold-climate designation
Yes
Official ENERGY STAR Most Efficient 2025
Yes
Official refrigerant type
R-454B
Official AHRI reference number
217291692
Official ENERGY STAR date certified
05/06/2026
Source-data note
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
Best for: Official 19,000 Btu/h official cooling, 25 official SEER2
6.3/10
What we like
Official ENERGY STAR record lists 25 SEER2.
Official ENERGY STAR record lists a cold-climate designation.
Watch out for
Official ratings are for the certified outdoor and indoor combination shown; a different official indoor head can change the certified figures.
Score breakdown
Official SEER230%
Official HSPF225%
Official EER220%
Official COP at 5°F25%
Official SEER2
25
Official HSPF2
10.4
Official EER2
15
Official COP at 5°F
2
Official ENERGY STAR unique ID
3,723,342
Official outdoor unit model number
ACIQ-18Z-HH-M3C
Official indoor unit model number
Not listed
Official series name
ACIQ Series
Official product type
HP - Mini or Multi Split
Official cooling capacity
19,000 Btu/h
Official heating capacity at 47°F
20,000 Btu/h
Official heating capacity at 17°F
20,000 Btu/h
Official heating capacity at 5°F
19,000 Btu/h
Official cold-climate designation
Yes
Official ENERGY STAR Most Efficient 2025
Yes
Official refrigerant type
R-454B
Official AHRI reference number
216032361
Also certified under official brand or model listings
1HVAC ACIQ-18Z-HH-M3C
Official ENERGY STAR date certified
05/06/2026
Source-data note
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
Best for: Official 19,000 Btu/h official cooling, 25 official SEER2
6.3/10
What we like
Official ENERGY STAR record lists 25 SEER2.
Official ENERGY STAR record lists a cold-climate designation.
Watch out for
Official ratings are for the certified outdoor and indoor combination shown; a different official indoor head can change the certified figures.
Score breakdown
Official SEER230%
Official HSPF225%
Official EER220%
Official COP at 5°F25%
Official SEER2
25
Official HSPF2
10.4
Official EER2
15
Official COP at 5°F
2
Official ENERGY STAR unique ID
3,554,569
Official outdoor unit model number
BMS500-AAM018-1CSXHD
Official indoor unit model number
Not listed
Official series name
BMS Series
Official product type
HP - Mini or Multi Split
Official cooling capacity
19,000 Btu/h
Official heating capacity at 47°F
20,000 Btu/h
Official heating capacity at 17°F
20,000 Btu/h
Official heating capacity at 5°F
19,000 Btu/h
Official cold-climate designation
Yes
Official ENERGY STAR Most Efficient 2025
Yes
Official refrigerant type
R-454B
Official AHRI reference number
215223316
Official indoor unit brand
BOSCH
Official ENERGY STAR date certified
05/06/2026
Source-data note
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
Best for: Official 19,000 Btu/h official cooling, 25 official SEER2
6.3/10
What we like
Official ENERGY STAR record lists 25 SEER2.
Official ENERGY STAR record lists a cold-climate designation.
Watch out for
Official ratings are for the certified outdoor and indoor combination shown; a different official indoor head can change the certified figures.
Score breakdown
Official SEER230%
Official HSPF225%
Official EER220%
Official COP at 5°F25%
Official SEER2
25
Official HSPF2
10.4
Official EER2
15
Official COP at 5°F
2
Official ENERGY STAR unique ID
3,712,417
Official outdoor unit model number
CH-RVHP19M-230VO
Official indoor unit model number
Not listed
Official series name
CH Series
Official product type
HP - Mini or Multi Split
Official cooling capacity
19,000 Btu/h
Official heating capacity at 47°F
20,000 Btu/h
Official heating capacity at 17°F
20,000 Btu/h
Official heating capacity at 5°F
19,000 Btu/h
Official cold-climate designation
Yes
Official ENERGY STAR Most Efficient 2025
Yes
Official refrigerant type
R-454B
Official AHRI reference number
215864269
Official ENERGY STAR date certified
05/06/2026
Source-data note
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
Best for: Official 19,000 Btu/h official cooling, 25 official SEER2
6.3/10
What we like
Official ENERGY STAR record lists 25 SEER2.
Official ENERGY STAR record lists a cold-climate designation.
Watch out for
Official ratings are for the certified outdoor and indoor combination shown; a different official indoor head can change the certified figures.
Score breakdown
Official SEER230%
Official HSPF225%
Official EER220%
Official COP at 5°F25%
Official SEER2
25
Official HSPF2
10.4
Official EER2
15
Official COP at 5°F
2
Official ENERGY STAR unique ID
3,712,581
Official outdoor unit model number
NDHAMBB-18-O
Official indoor unit model number
Not listed
Official series name
NDH Series
Official product type
HP - Mini or Multi Split
Official cooling capacity
19,000 Btu/h
Official heating capacity at 47°F
20,000 Btu/h
Official heating capacity at 17°F
20,000 Btu/h
Official heating capacity at 5°F
19,000 Btu/h
Official cold-climate designation
Yes
Official ENERGY STAR Most Efficient 2025
Yes
Official refrigerant type
R-454B
Official AHRI reference number
215931373
Official ENERGY STAR date certified
05/06/2026
Source-data note
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
Best for: Official 18,000 Btu/h official cooling, 27.5 official SEER2
6.1/10
What we like
Official ENERGY STAR record lists 27.5 SEER2.
Official ENERGY STAR record lists a cold-climate designation.
Watch out for
Official ratings are for the certified outdoor and indoor combination shown; a different official indoor head can change the certified figures.
Score breakdown
Official SEER230%
Official HSPF225%
Official EER220%
Official COP at 5°F25%
Official SEER2
27.5
Official HSPF2
10
Official EER2
14.3
Official COP at 5°F
1.8
Official ENERGY STAR unique ID
4,610,405
Official outdoor unit model number
GS18HP230V1RYO
Official indoor unit model number
GS18HP230V1RYI
Official series name
Airy
Official product type
HP - Mini or Multi Split
Official cooling capacity
18,000 Btu/h
Official heating capacity at 47°F
18,600 Btu/h
Official heating capacity at 17°F
19,500 Btu/h
Official heating capacity at 5°F
18,000 Btu/h
Official cold-climate designation
Yes
Official ENERGY STAR Most Efficient 2025
Yes
Official refrigerant type
R-32
Official AHRI reference number
218425011
Other official indoor models listed with this outdoor unit
GS18HP230V1CASI, GS18HP230V1FCI, GS18HP230V1OWCI
Official ENERGY STAR date certified
05/06/2026
Source-data note
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
Best for: Official 18,000 Btu/h official cooling, 24 official SEER2
5.5/10
What we like
Official ENERGY STAR record lists 24 SEER2.
Official ENERGY STAR record lists 10.5 HSPF2.
Official ENERGY STAR record lists a cold-climate designation.
Watch out for
Official ratings are for the certified outdoor and indoor combination shown; a different official indoor head can change the certified figures.
Score breakdown
Official SEER230%
Official HSPF225%
Official EER220%
Official COP at 5°F25%
Official SEER2
24
Official HSPF2
10.5
Official EER2
13
Official COP at 5°F
2
Official ENERGY STAR unique ID
3,999,483
Official outdoor unit model number
YN020GLSI24M2G
Official indoor unit model number
Not listed
Official series name
Quantum Ultra Multi
Official product type
HP - Mini or Multi Split
Official cooling capacity
18,000 Btu/h
Official heating capacity at 47°F
20,000 Btu/h
Official heating capacity at 17°F
20,000 Btu/h
Official heating capacity at 5°F
16,000 Btu/h
Official cold-climate designation
Yes
Official ENERGY STAR Most Efficient 2025
Yes
Official refrigerant type
R-454B
Official AHRI reference number
217048768
Official ENERGY STAR date certified
09/01/2026
Source-data note
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
Best for: Official 24,000 Btu/h official cooling, 24.6 official SEER2
5.4/10
What we like
Official ENERGY STAR record lists 24.6 SEER2.
Official ENERGY STAR record lists a cold-climate designation.
Watch out for
Official ratings are for the certified outdoor and indoor combination shown; a different official indoor head can change the certified figures.
Score breakdown
Official SEER230%
Official HSPF225%
Official EER220%
Official COP at 5°F25%
Official SEER2
24.6
Official HSPF2
10
Official EER2
13.4
Official COP at 5°F
1.93
Official ENERGY STAR unique ID
2,470,698
Official outdoor unit model number
MPC024S4M-1P
Official indoor unit model number
Not listed
Official series name
M series
Official product type
HP - Mini or Multi Split
Official cooling capacity
24,000 Btu/h
Official heating capacity at 47°F
24,800 Btu/h
Official heating capacity at 17°F
15,000 Btu/h
Official heating capacity at 5°F
17,800 Btu/h
Official cold-climate designation
Yes
Official ENERGY STAR Most Efficient 2025
Yes
Official refrigerant type
R-410A
Official AHRI reference number
207699116
Official indoor unit brand
LENNOX
Official ENERGY STAR date certified
06/13/2026
Source-data note
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
Best for: Official 18,000 Btu/h official cooling, 25 official SEER2
5.2/10
What we like
Official ENERGY STAR record lists 25 SEER2.
Official ENERGY STAR record lists a cold-climate designation.
Watch out for
Official ratings are for the certified outdoor and indoor combination shown; a different official indoor head can change the certified figures.
Score breakdown
Official SEER230%
Official HSPF225%
Official EER220%
Official COP at 5°F25%
Official SEER2
25
Official HSPF2
10
Official EER2
11.7
Official COP at 5°F
2
Official ENERGY STAR unique ID
4,623,919
Official outdoor unit model number
048-TCQ-MODU-1D2
Official indoor unit model number
Not listed
Official series name
TC
Official product type
HP - Mini or Multi Split
Official cooling capacity
18,000 Btu/h
Official heating capacity at 47°F
18,000 Btu/h
Official heating capacity at 17°F
14,000 Btu/h
Official heating capacity at 5°F
14,000 Btu/h
Official cold-climate designation
Yes
Official ENERGY STAR Most Efficient 2025
Yes
Official refrigerant type
R-32
Official AHRI reference number
218470992
Official ENERGY STAR date certified
06/09/2026
Source-data note
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
Best for: Official 24,000 Btu/h official cooling, 24 official SEER2
4.6/10
What we like
Official ENERGY STAR record lists 24 SEER2.
Watch out for
Official ENERGY STAR record does not list a cold-climate designation.
Score breakdown
Official SEER230%
Official HSPF225%
Official EER220%
Official COP at 5°F25%
Official SEER2
24
Official HSPF2
10.2
Official EER2
12
Official COP at 5°F
1.8
Official ENERGY STAR unique ID
3,998,674
Official outdoor unit model number
3G24AD2BE**
Official indoor unit model number
Not listed
Official series name
Altitude Multi
Official product type
HP - Mini or Multi Split
Official cooling capacity
24,000 Btu/h
Official heating capacity at 47°F
27,000 Btu/h
Official heating capacity at 17°F
16,400 Btu/h
Official heating capacity at 5°F
17,600 Btu/h
Official cold-climate designation
No
Official ENERGY STAR Most Efficient 2025
Yes
Official refrigerant type
R-454B
Official AHRI reference number
217009762
Official ENERGY STAR date certified
01/07/2026
Source-data note
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
Best for: Official 24,000 Btu/h official cooling, 23 official SEER2
4.6/10
What we like
Official ENERGY STAR record lists 23 SEER2.
Official ENERGY STAR record lists 10.5 HSPF2.
Official ENERGY STAR record lists a cold-climate designation.
Watch out for
Official ratings are for the certified outdoor and indoor combination shown; a different official indoor head can change the certified figures.
Score breakdown
Official SEER230%
Official HSPF225%
Official EER220%
Official COP at 5°F25%
Official SEER2
23
Official HSPF2
10.5
Official EER2
12.2
Official COP at 5°F
1.8
Official ENERGY STAR unique ID
3,999,068
Official outdoor unit model number
3G24ED2BE**
Official indoor unit model number
Not listed
Official series name
Endure Multi
Official product type
HP - Mini or Multi Split
Official cooling capacity
24,000 Btu/h
Official heating capacity at 47°F
25,000 Btu/h
Official heating capacity at 17°F
17,000 Btu/h
Official heating capacity at 5°F
22,800 Btu/h
Official cold-climate designation
Yes
Official ENERGY STAR Most Efficient 2025
Yes
Official refrigerant type
R-454B
Official AHRI reference number
217009765
Official ENERGY STAR date certified
01/08/2026
Source-data note
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
Best for: Official 24,000 Btu/h official cooling, 24 official SEER2
4.6/10
What we like
Official ENERGY STAR record lists 24 SEER2.
Watch out for
Official ENERGY STAR record does not list a cold-climate designation.
Score breakdown
Official SEER230%
Official HSPF225%
Official EER220%
Official COP at 5°F25%
Official SEER2
24
Official HSPF2
10.2
Official EER2
12
Official COP at 5°F
1.8
Official ENERGY STAR unique ID
3,998,672
Official outdoor unit model number
3Q24FF2BE**
Official indoor unit model number
Not listed
Official series name
Flexfit Multi
Official product type
HP - Mini or Multi Split
Official cooling capacity
24,000 Btu/h
Official heating capacity at 47°F
27,000 Btu/h
Official heating capacity at 17°F
16,400 Btu/h
Official heating capacity at 5°F
17,600 Btu/h
Official cold-climate designation
No
Official ENERGY STAR Most Efficient 2025
Yes
Official refrigerant type
R-454B
Official AHRI reference number
217009755
Official indoor unit brand
HAIER
Official ENERGY STAR date certified
01/07/2026
Source-data note
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
Best for: Official 18,000 Btu/h official cooling, 23.8 official SEER2
4.4/10
What we like
Official ENERGY STAR record lists 23.8 SEER2.
Official ENERGY STAR record lists a cold-climate designation.
Watch out for
Official ratings are for the certified outdoor and indoor combination shown; a different official indoor head can change the certified figures.
Score breakdown
Official SEER230%
Official HSPF225%
Official EER220%
Official COP at 5°F25%
Official SEER2
23.8
Official HSPF2
9.3
Official EER2
13
Official COP at 5°F
1.8
Official ENERGY STAR unique ID
3,712,537
Official outdoor unit model number
AC018DXADCG
Official indoor unit model number
AC018DN4DCG
Official series name
4-Way Cassette (WindFree™) Standard (CAC)
Official product type
HP - Mini or Multi Split
Official cooling capacity
18,000 Btu/h
Official heating capacity at 47°F
20,000 Btu/h
Official heating capacity at 17°F
11,600 Btu/h
Official heating capacity at 5°F
16,000 Btu/h
Official cold-climate designation
Yes
Official ENERGY STAR Most Efficient 2025
Yes
Official refrigerant type
R-32
Official AHRI reference number
215490142
Other official indoor models listed with this outdoor unit
AC018DNHDCG, AC018DNZDCG
Official ENERGY STAR date certified
04/17/2026
Source-data note
The ENERGY STAR record lists other official indoor-unit matchups with this outdoor model that have different official SEER2, HSPF2, EER2 or COP at 5°F ratings. The scores on this page are for the official combination shown, not those other matchups.
Buying guide: how to choose the right mid-capacity mini-split heat pump
This table is for official 12,001 to 24,000 Btu/h systems
Every product here has an official ENERGY STAR cooling capacity from 12,001 to 24,000 Btu/h, the usual 18,000 and 24,000 Btu/h classes. Compact official capacities of 12,000 Btu/h or less, and larger official capacities above 24,000 Btu/h, are ranked in their own tables. Official SEER2, official HSPF2, official EER2 and official COP at 5°F are still the scored fields.
Official ratings are for a certified combination, not a room we measured
SEER2, HSPF2, EER2 and COP at 5°F on the ENERGY STAR record are certified ratings for a listed outdoor unit matched with a listed indoor unit. A different official indoor head can change those figures. Official cooling capacity is a certified combination figure, not a Manual J load calculation.
What “Not listed” means
If official HSPF2, EER2 or COP at 5°F is missing from the ENERGY STAR record, the field is Not listed and scores at the category minimum. Indoor-head style, line-set length and sound level are almost always Not listed on this dataset.
Safety
A ductless mini-split heat pump uses refrigerant under pressure and a dedicated high-voltage circuit. Installation, line-set work, vacuum, and refrigerant charging should be done by an EPA Section 608 certified HVAC technician following the maker's instructions, the National Electrical Code, and local rules. Several official refrigerants in this catalog, including R-32 and R-454B, are mildly flammable (A2L); do not attempt a refrigerant DIY install. Leave required outdoor clearances, slope the condensate drain, and use a disconnect at the outdoor unit. Official cooling and heating capacities are certified combination ratings, not a guarantee that a unit will heat or cool a given room — size the system with a load calculation. Confirm the current official specification, the indoor head type, and the line-set limits with the maker and the installer before you buy.
How this ranking is calculated
Score = weighted average of normalised specs, out of 10. Full method
Official SEER2The official SEER2 cooling-efficiency rating published on the ENERGY STAR certified mini-split heat pump record, in Btu/Wh. It is the certified combination rating for the outdoor and indoor units shown, not a seasonal bill we measured. Official figures above 28 are clamped at the 28 reference best. Scale: 16 → 28.
30%
Official HSPF2The official HSPF2 heating-efficiency rating published on the ENERGY STAR record, in Btu/Wh. It is the certified combination rating, not a winter heating test we ran. Official figures above 13 are clamped at the 13 reference best. Scale: 8 → 13.
25%
Official EER2The official EER2 cooling-efficiency rating published on the ENERGY STAR record, in Btu/Wh. EER2 is a certified steady-state figure at a stated test condition, not a seasonal measurement we made. Official figures above 16 are clamped at the 16 reference best. Scale: 9 → 16.
20%
Official COP at 5°FThe official coefficient of performance at 5°F published on the ENERGY STAR record. Higher official COP at 5°F means more certified heating output per unit of input at that cold-climate test point. It is a certified laboratory figure, not a test at a house we ran. If the field is blank it is shown as Not listed. Official figures above 2.6 are clamped at the 2.6 reference best. Scale: 1.5 → 2.6.
No. Rankings use only figures published on the ENERGY STAR certified mini-split heat pump record, each linked on the product page. We do not publish prices, customer ratings or hands-on test scores.
Is a higher official SEER2 always the right mid-capacity unit?
No. Official SEER2 is a certified cooling-efficiency rating for one outdoor/indoor combination. It does not tell you whether the official cooling capacity matches the room, or how the official COP at 5°F compares in a cold climate. Use the score to shortlist, then confirm capacity and the indoor head with a load calculation and the maker.
Why do some official model numbers appear under more than one brand on the ENERGY STAR record?
Several outdoor model numbers are certified under more than one official brand, often as rebadges. When the official scored fields are identical we keep one page and list the other official brand or model listings as additional certified names.
Do commissions change the ranking?
No. Amazon may pay a commission if you buy through a Check price button, at no extra cost to you. Commissions never change the order, and no brand can pay for placement.
Why is indoor-head style, line-set length or sound level Not listed?
The ENERGY STAR mini-split heat pump record we used does not include a consistent official field for indoor-head style (wall, cassette, floor or concealed), maximum line-set length, or sound pressure. When those facts are not on the certified record, we show them as Not listed and do not fill the gap from retailer listings or brochures. Confirm the indoor style and the line-set limits with the maker before you buy.
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