What is the best 6,000 BTU mini-split?

On certified efficiency, the Carrier 37MPRAQ06AA3 leads at 35.1 SEER2 and 15.6 HSPF2. For cold climates the American Standard / Mitsubishi Electric NAXSPH06B112A has the best efficiency at 5°F (COP 2.46). For very hot summers the Mitsubishi Electric MUZ-FX06NLHZ has the highest EER2 (21.5). The right pick depends on your climate, so compare the lists above.

How much does a 6,000 BTU mini-split cost to run?

A typical 6,000 BTU mini-split (25.7 SEER2, 12.8 HSPF2) uses about $123 of electricity a year in a mixed climate like Atlanta, roughly $10 a month on average. Across U.S. climates it ranges from $122 to $247 a year. The most efficient model in this class saves about $26 a year in Atlanta.

Which 6,000 BTU mini-split works best in cold weather?

Look for ENERGY STAR cold-climate certification (39 of 42 qualify). The American Standard / Mitsubishi Electric NAXSPH06B112A has the highest COP at 5°F in this class (2.46) and delivers 10,500 BTU/h at 5°F. Cold-climate units are often marketed as hyper-heat or low-ambient models.

Best 6,000 BTU mini-splits

42 ENERGY STAR certified 6,000 BTU mini-splits from 25 brands, ranked on their official ratings. Here are the winners for each kind of home, then the full list.

Best overall

Carrier 37MPRAQ06AA3

6,000 BTU mini-split · 45M Series · cold-climate certified

SEER2: 35.1
HSPF2: 15.6
Heat at 5°F: 13,500

Highest seasonal cooling efficiency of all 42 6,000 BTU mini-splits, with 15.6 HSPF2 for heating.

Full specs and running cost

Best for cold winters

American Standard / Mitsubishi Electric NAXSPH06B112A

6,000 BTU mini-split · M-Series · cold-climate certified

SEER2: 32.2
HSPF2: 11.9
COP at 5°F: 2.46

Cold-climate certified, with one of the best efficiencies at 5°F in this size (COP 2.46).

Full specs and running cost

Best for hot summers

Mitsubishi Electric MUZ-FX06NLHZ

6,000 BTU mini-split · M-Series · cold-climate certified

SEER2: 35.0
HSPF2: 13.0
EER2: 21.5

EER2 of 21.5: among the most efficient on a 95°F afternoon.

Full specs and running cost

Area one unit coversabout 150-200 sq ft
Typical running cost$123/yr in Atlanta
Average efficiency27.1 SEER2
Cold-climate certified39 of 42

Compare all 42 6,000 BTU mini-splits

42 models, ranked by SEER2 (cooling efficiency), then HSPF2.

#							Cold
1	Carrier 37MPRAQ06AA345M Series	6,000 BTU	35.1	17.5	15.6	13,500	Yes	7
2	MDV MOX430-06HFN10-M1HMSEP Series	6,000 BTU	35.1	17.5	15.6	13,500	Yes	3
3	Mainline ML06HP230CALH-OML Series	6,000 BTU	35.0	17.4	15.6	13,500	Yes	2
4	Midea MO1SS-H06B-2AMSE Series	6,000 BTU	35.0	17.4	15.6	13,500	Yes	1
5	Mitsubishi Electric MUZ-FX06NLHZM-Series	6,000 BTU	35.0	21.5	13.0	12,600	Yes	1
6	Arcoaire D5CPRAH06AAKD5F Series	6,000 BTU	33.1	16.5	15.6	13,500	Yes	11
7	American Standard / Mitsubishi Electric NAXSPH06B112AM-Series	6,000 BTU	32.2	19.1	11.9	10,500	Yes	1
8	Mitsubishi Electric MUZ-FS06NAM-Series	6,000 BTU	32.2	19.1	11.9	10,500	Yes	3
9	American Standard / Mitsubishi Electric NAXSPB06B112AM-Series	6,000 BTU	32.2	19.1	10.9	10,500	Yes	1
10	Mitsubishi Electric MUZ-FS06NAHM-Series	6,000 BTU	32.2	19.1	10.9	10,500	Yes	3
11	Blueridge BMY6HH27CBM series	6,000 BTU	26.5	15.8	13.6	8,000	Yes	3
12	Carrier 38MARBQ06AA338MAR-series	6,000 BTU	26.5	15.8	13.6	8,000	Yes	10
13	Comfort-Aire A-VMH06SV-1A-series	6,000 BTU	26.5	15.8	13.6	7,500	Yes	3
14	Comfortmaker DLCSRBH06AAKDLC-series	6,000 BTU	26.5	15.8	13.6	8,000	Yes	48
15	Cooper&Hunter CH-HPR06F9-230VOCH series	6,000 BTU	26.5	15.8	13.6	8,000	Yes	8
16	Custom Comfort CCOXHASZ06HPCCO Series	6,000 BTU	26.5	15.8	13.6	8,000	Yes	2
17	Elios DEA06HOS28230E8DE-series	6,000 BTU	26.5	15.8	13.6	7,500	Yes	2
18	MOOVAIR DMA06HOS28230E8DM-series	6,000 BTU	26.5	15.8	13.6	7,500	Yes	1
19	Arcoaire D5CSHAH06AAKD5F Series	6,000 BTU	25.7	18.0	14.8	8,100	Yes	35
20	Carrier 37MAHAQ06AA345M Series	6,000 BTU	25.7	18.0	14.8	8,100	Yes	17
21	MDV MOX230-06HFN10-M1XMSEP series	6,000 BTU	25.7	18.0	14.8	8,100	Yes	12
22	MDV MOX230-06HFN10-M1MSEPB	6,000 BTU	25.7	18.1	12.8	8,300	Yes	1
23	Blueridge BXS5A06UC0BXS Series	6,000 BTU	25.5	18.0	14.8	8,100	Yes	2
24	Comfort-Aire A-VHP06SA-1A-VHP Series	6,000 BTU	25.5	18.0	14.8	8,100	Yes	6
25	Cooper&Hunter CH-RHP06F9-230VOCH Series	6,000 BTU	25.5	18.0	14.8	8,100	Yes	7
26	Innovair MOS06H2BH0AMHW Series	6,000 BTU	25.5	18.0	14.8	7,700	Yes	1
27	KERR A-KHP06SA-1A-KHP Series	6,000 BTU	25.5	18.0	14.8	8,100	Yes	3
28	Midea MO1HS-H06B-2AMSE Series	6,000 BTU	25.5	18.0	14.8	8,100	Yes	3
29	NOVAIR LEA06SZ36-OLEA Series	6,000 BTU	25.5	18.0	14.8	7,800	Yes	3
30	AI AIR CONDITIONING AO25-06N2-M1HAO Series	6,000 BTU	25.3	16.0	14.6	8,100	Yes	3
31	Mainline ML06HP230NEXH-OML Series	6,000 BTU	25.3	16.0	14.6	8,100	Yes	6
32	PerfectAire 4PAMSHH06-SZO4PAM Series	6,000 BTU	25.3	16.0	14.6	7,500	Yes	1
33	SLIMAIR SHC06AH2AGSHC Series	6,000 BTU	25.3	16.0	14.6	7,800	Yes	3
34	TRUST AIR CONDITIONERS OUS06H/O6S4POUS Series	6,000 BTU	25.3	16.0	14.6	8,100	Yes	2
35	AI AIR CONDITIONING AO25-06N1-M1HAW Series	6,000 BTU	23.5	15.0	12.0	7,100	Yes	1
36	LBG Products LBHB06DVWOLBH series	6,000 BTU	23.5	15.0	12.0	7,100	Yes	2
37	Mitsutomo HO-SZ06-AB-QHO Series	6,000 BTU	23.5	15.0	12.0	8,000	Yes	2
38	C&H CH-06OLVWM-115VOCH series	6,000 BTU	23.0	13.8	9.8	6,700	No	3
39	C&H CH-ES06-115VOCH series	6,000 BTU	23.0	13.8	9.8	6,700	No	2
40	Star Air Kontrol SAK-06-OCT2/220VSAK Series	6,000 BTU	22.0	15.0	12.0	8,100	Yes	1
41	Cooper&Hunter CH-NY06MIA-115VOCH series	6,000 BTU	21.5	12.5	9.0	6,000	No	3
42	Star Air Kontrol SAK-06-DT2/220VSAK Series	6,000 BTU	21.4	14.4	13.8	7,800	Yes	1

More about 6,000 BTU mini-splits

Top 5 for cold climatesranked by COP at 5°F

Cold-climate certified models with the highest efficiency at 5°F. Often sold as hyper-heat or low-ambient models.

#	Model	SEER2	EER2	HSPF2	COP at 5°F
1	American Standard / Mitsubishi Electric NAXSPH06B112A	32.2	19.1	11.9	2.46
2	Mitsubishi Electric MUZ-FS06NAalso sold as 1 other model number	32.2	19.1	11.9	2.46
3	American Standard / Mitsubishi Electric NAXSPB06B112A	32.2	19.1	10.9	2.46
4	Mitsubishi Electric MUZ-FS06NAHalso sold as 1 other model number	32.2	19.1	10.9	2.46
5	MDV MOX230-06HFN10-M1	25.7	18.1	12.8	2.40

Top 5 for hot climatesranked by EER2

Highest efficiency on a 95°F afternoon, which drives summer bills in places like Phoenix, Houston and Florida.

#	Model	SEER2	EER2	HSPF2	COP at 5°F
1	Mitsubishi Electric MUZ-FX06NLHZalso sold as 1 other model number	35.0	21.5	13.0	2.38
2	American Standard / Mitsubishi Electric NAXSPB06B112A	32.2	19.1	10.9	2.46
3	American Standard / Mitsubishi Electric NAXSPH06B112A	32.2	19.1	11.9	2.46
4	Mitsubishi Electric MUZ-FS06NAalso sold as 1 other model number	32.2	19.1	11.9	2.46
5	Mitsubishi Electric MUZ-FS06NAHalso sold as 1 other model number	32.2	19.1	10.9	2.46

Top 5 for heatingranked by HSPF2

Highest seasonal heating efficiency, for homes where the heat pump replaces a furnace.

#	Model	SEER2	EER2	HSPF2	COP at 5°F
1	Arcoaire D5CPRAH06AAK	33.1	16.5	15.6	2.00
2	Carrier 37MPRAQ06AA3	35.1	17.5	15.6	2.00
3	Mainline ML06HP230CALH-Oalso sold as 2 other model numbers	35.0	17.4	15.6	2.00
4	MDV MOX430-06HFN10-M1H	35.1	17.5	15.6	2.00
5	Midea MO1SS-H06B-2Aalso sold as 6 other model numbers	35.0	17.4	15.6	2.00

How many square feet does a 6,000 BTU mini-split cover?150-200 sq ft

Hot and dry climate (Phoenix)up to 150 sq ft
Hot and humid climate (Houston)up to 150 sq ft
Mixed climate (Atlanta)up to 150 sq ft
Cold climate (Chicago)up to 200 sq ft
Very cold climate (Minneapolis)up to 200 sq ft

Average insulation, 8 ft ceilings. Sunny rooms, kitchens and older houses need more capacity. Size calculator

What a 6,000 BTU mini-split costs to run$10/month typical

Hot and dry (Phoenix)$136/yr · best $102
Hot and humid (Houston)$122/yr · best $92
Mixed (Atlanta)$123/yr · best $97
Cold (Chicago)$240/yr · best $194
Very cold (Minneapolis)$247/yr · best $201

Typical = median model of this size (25.7 SEER2, 12.8 HSPF2); best = most efficient. Local electricity prices from the U.S. EIA. Calculate for your home

Questions4

What is the best 6,000 BTU mini-split?: On certified efficiency, the Carrier 37MPRAQ06AA3 leads at 35.1 SEER2 and 15.6 HSPF2. For cold climates the American Standard / Mitsubishi Electric NAXSPH06B112A has the best efficiency at 5°F (COP 2.46). For very hot summers the Mitsubishi Electric MUZ-FX06NLHZ has the highest EER2 (21.5). The right pick depends on your climate, so compare the lists above.
How many square feet does a 6,000 BTU mini-split cover?: About 150 to 200 sq ft with average insulation: 150 sq ft in a hot and dry climate like Phoenix, 150 sq ft in a hot and humid climate like Houston, 150 sq ft in a mixed climate like Atlanta, 200 sq ft in a cold climate like Chicago, 200 sq ft in a very cold climate like Minneapolis. Cold climates cover less because the heating load is larger.
How much does a 6,000 BTU mini-split cost to run?: A typical 6,000 BTU mini-split (25.7 SEER2, 12.8 HSPF2) uses about $123 of electricity a year in a mixed climate like Atlanta, roughly $10 a month on average. Across U.S. climates it ranges from $122 to $247 a year. The most efficient model in this class saves about $26 a year in Atlanta.
Which 6,000 BTU mini-split works best in cold weather?: Look for ENERGY STAR cold-climate certification (39 of 42 qualify). The American Standard / Mitsubishi Electric NAXSPH06B112A has the highest COP at 5°F in this class (2.46) and delivers 10,500 BTU/h at 5°F. Cold-climate units are often marketed as hyper-heat or low-ambient models.

Other sizes

ENERGY STAR data, updated October 12, 2026

Best 6,000 BTU mini-splits

Top picks

Carrier 37MPRAQ06AA3

American Standard / Mitsubishi Electric NAXSPH06B112A

Mitsubishi Electric MUZ-FX06NLHZ

Compare all 42 6,000 BTU mini-splits

More about 6,000 BTU mini-splits

Other sizes