How many indoor units can the GREE Multi-Zone ODU connect to?

A single GREE R32 Multi-Zone outdoor unit can connect to up to 6 indoor units, allowing you to condition multiple rooms with just one outdoor system — reducing outdoor clutter, saving space, and simplifying installation. The 60K model (GS6M60HP230V1MO, shorthand 60MO, GS6M series) supports the full 6 units; smaller capacities support 3–5 depending on model.

What does GS2M18HP230V1MO mean?

GS2M18HP230V1MO is the 18K (18,000 BTU/h) GREE Multi-Zone outdoor unit. 'GS' is the GREE Series prefix, '2M' denotes the 2nd-generation M-series multi-zone platform, '18' is the 18K capacity, 'HP' is heat pump, '230V' is 230V/60Hz, '1MO' is the first revision of the Multi-zone Outdoor unit. Contractors shorten it to 18MO. The same naming applies across the lineup: GS3M24HP230V1MO (24MO, GS3M), GS4M30HP230V1MO (30MO, GS4M), GS4M36HP230V1MO (36MO, GS4M), GS5M42HP230V1MO (42MO, GS5M), GS5M48HP230V1MO (48MO, GS5M), and GS6M60HP230V1MO (60MO, GS6M).

What types of indoor units are compatible with the Multi-Zone ODU?

The Multi-Zone system is compatible with wall-mounted, ducted, cassette, floor-ceiling, and air handler indoor units, giving each room a comfort solution that fits its layout and design. The 30K (GS4M30HP230V1MO, 30MO) and 36K (GS4M36HP230V1MO, 36MO) support up to 4 indoor units; the 42K (GS5M42HP230V1MO, 42MO) and 48K (GS5M48HP230V1MO, 48MO) support up to 5; the 60K (GS6M60HP230V1MO, 60MO) supports up to 6.

What is the heating and cooling range of the Multi-Zone ODU?

The full GREE Multi-Zone lineup — including the 18K (GS2M18HP230V1MO), 24K (GS3M24HP230V1MO), 30K (GS4M30HP230V1MO), 36K (GS4M36HP230V1MO), 42K (GS5M42HP230V1MO), 48K (GS5M48HP230V1MO), and 60K (GS6M60HP230V1MO) — supports cooling from -22°F to 118°F and heating from -22°F to 75°F, helping maintain comfort in demanding outdoor conditions year-round.

How long can the refrigerant line set be on the Multi-Zone system?

Individual line lengths reach up to 328 ft, with a total piping length of up to 394 ft across all connected indoor units — ideal for serving multiple rooms and complex building layouts. This applies across the full GREE Multi-Zone ODU lineup from 18K (GS2M18HP230V1MO, 18MO) to 60K (GS6M60HP230V1MO, 60MO).

Does the Multi-Zone ODU require a dedicated 230V circuit?

Yes, the Multi-Zone ODU series operates on 230V/60Hz/1Ph and requires a dedicated circuit. This applies to all seven capacities: GS2M18HP230V1MO (18MO), GS3M24HP230V1MO (24MO), GS4M30HP230V1MO (30MO), GS4M36HP230V1MO (36MO), GS5M42HP230V1MO (42MO), GS5M48HP230V1MO (48MO), and GS6M60HP230V1MO (60MO). Consult a licensed HVAC contractor for proper electrical setup and local code compliance.

What is the difference between a single-zone and a multi-zone heat pump?

A single-zone heat pump connects one outdoor unit to one indoor unit, ideal for a single room. A multi-zone heat pump, like the GREE Multi-Zone ODU (MO series), connects one outdoor unit to up to six indoor units, allowing you to control temperatures in multiple rooms independently. This is more cost-effective and space-efficient than installing multiple single-zone systems.

Can a GREE multi-zone heat pump heat and cool different rooms at the same time?

While each indoor unit can be set to a different temperature, all indoor units connected to a single outdoor unit must operate in the same mode (either heating or cooling) simultaneously. You cannot heat one room and cool another at the exact same time with one multi-zone system. This applies across the full MO series from GS2M18HP230V1MO to GS6M60HP230V1MO.

What capacities is the GREE Multi-Zone ODU available in?

The Multi-Zone ODU is available in seven capacities: 18K (GS2M18HP230V1MO, shorthand 18MO, GS2M series), 24K (GS3M24HP230V1MO, 24MO, GS3M series), 30K (GS4M30HP230V1MO, 30MO, GS4M series), 36K (GS4M36HP230V1MO, 36MO, GS4M series), 42K (GS5M42HP230V1MO, 42MO, GS5M series), 48K (GS5M48HP230V1MO, 48MO, GS5M series), and 60K (GS6M60HP230V1MO, 60MO, GS6M series) BTU/h.

Why does the GREE Multi-Zone ODU use R32 refrigerant?

The GREE Multi-Zone ODU uses R32 refrigerant, which has a lower Global Warming Potential (GWP) than older R410A refrigerant. Combined with GREE's inverter technology, R32 helps achieve up to 21.0 SEER2 efficiency, reducing environmental impact and lowering energy costs across all seven capacities from 18K (GS2M18HP230V1MO) to 60K (GS6M60HP230V1MO).

How compact is the new G-Max Multi-Zone outdoor unit?

New G-Max outdoor units are approximately 32% smaller than the previous generation, helping fit tighter yards, balconies, and urban installation spaces. This applies to all GREE Multi-Zone ODU models including the GS4M series (30K GS4M30HP230V1MO and 36K GS4M36HP230V1MO) and GS5M series (42K GS5M42HP230V1MO and 48K GS5M48HP230V1MO).

Where can I download the Multi-Zone submittal sheets and manuals?

Submittal data for all seven capacities — 18K (GS2M18HP230V1MO), 24K (GS3M24HP230V1MO), 30K (GS4M30HP230V1MO), 36K (GS4M36HP230V1MO), 42K (GS5M42HP230V1MO), 48K (GS5M48HP230V1MO), and 60K (GS6M60HP230V1MO) — along with the Owner's Manual and Service Manual, are available in the Downloads section of this page.

How much does the GREE Multi-Zone ODU cost, and where can I buy it?

The GREE Multi-Zone Outdoor Unit is available exclusively through authorized GREE USA dealers nationwide. Pricing varies by capacity (18K–60K), number of indoor units, installation complexity, and local market. Contact GREE USA at 1-631-263-8878 or email info@gree.us for current pricing, promotions, and installation quotes.

Multi-zone ODU

GS2M18HP230V1MO, GS3M24HP230V1MO, GS4M30HP230V1MO, GS4M36HP230V1MO,

GS5M42HP230V1MO, GS5M48HP230V1MO, GS6M60HP230V1MO

● Up to 21.0 SEER2 / 13.6 EER2 / 10.0 HSPF2 efficiency

● Cooling Range from -22°F - 118°F

● Heating Range from -22°F - 75°F

● Supports line lengths up to 328 ft.

GREE R32 Multi-Zone Ductless Outdoor Unit (18K – 60K)

The GREE R32 Multi-Zone System connects one outdoor unit to multiple indoor units, delivering flexible room-by-room comfort, reduced outdoor clutter, easier installation, and reliable year-round performance.

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DOWNLOADS

Submittal data

Multi 18K

Explore the Multi 18K submittal data.

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Submittal data

Multi 24K

Explore the Multi 24K submittal data.

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submittal data

Multi 30K

Explore the Multi 30K submittal data.

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Submittal data

Multi 36K

Explore the Multi 36K submittal data.

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Submittal data

Multi 42K

Explore the Multi 42K submittal data.

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Submittal data

Multi 48K

Explore the Multi 48K submittal data.

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Submittal data

Multi 60K

Explore the Multi 60K submittal data.

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Manual

Owner's Manual

Access the Multi Zone user guide.

DOWNLOAD ⬇

Manual

Service Manual

Access the Multi Zone user guide.

DOWNLOAD ⬇

ꁆ ꁇ

Select Capacity (Cooling)

18K

CURRENT SELECTION

GS2M18HP230V1MO

18000 BTU/h
24K

CURRENT SELECTION

GS3M24HP230V1MO

24000 BTU/h
30K

CURRENT SELECTION

GS4M30HP230V1MO

30000 BTU/h
36K

CURRENT SELECTION

GS4M36HP230V1MO

36000 BTU/h
42K

CURRENT SELECTION

GS5M42HP230V1MO

42000 BTU/h
48K

CURRENT SELECTION

GS5M48HP230V1MO

48000 BTU/h
60K

CURRENT SELECTION

GS6M60HP230V1MO

60000 BTU/h

Home ꄲ Products ꄲ MultiZoneODU

More Comfort, Less Outdoor Clutter

Comfort multiple rooms with just one outdoor unit. The GREE R32 Multi-Zone System can connect up to 6 indoor units, helping reduce outdoor equipment, save space, and simplify installation.

Room-by-Room Comfort That Fits Your Home

Every room has different comfort needs. With compatible wall-mounted, ducted, cassette, floor-ceiling, and air handler indoor units, this system gives each space a comfort solution that fits its layout.

Built-In Protection for Peace of Mind

A multi-zone system should do more than heat and cool. With refrigerant leakage sensing, intelligent defrosting, low-voltage startup, and safety protections, the GREE R32 Multi-Zone System keeps comfort safer and more reliable.
Long-Reach Installation

Total piping length reaches up to 394 ft, helping serve more rooms and complex building layouts.

-22°F Low-Temperature Operation

The full lineup supports cooling and heating operation down to -22°F, helping maintain comfort in demanding outdoor conditions.

Intelligent Defrost Control

Temperature sensors detect frost status and manage defrosting intelligently to help maintain heating comfort.

Whole-Home Zoning

Connect one outdoor unit to up to 6 indoor units, bringing customized comfort to different rooms without multiple outdoor systems.

More Compact Outdoor Design

New G-Max outdoor units are about 32% smaller than the previous generation, helping fit tighter yards, balconies, and urban installation spaces.

Flexible Capacity Matching

Supports a 50%–150% connected indoor capacity ratio, with 100%–135% recommended for balanced system design.

Smarter System Protection

The system can adjust operation during certain non-critical faults, helping maintain comfort while protecting the unit.

Corrosion-Resistant Build

Protected sheet metal, coated PCB, durable insulation, and optional black condenser help improve outdoor durability.

Section	Specification Item	Condition / Detail	Unit	18 MO Value	24 MO Value	30 MO Value	36 MO Value	42 MO Value	48 MO Value	60 MO Value
Product Identification	Product Category			Heat Pump	Heat Pump	Heat Pump	Heat Pump	Heat Pump	Heat Pump	Heat Pump
	Outdoor Model			GS2M18HP230V1MO	GS3M24HP230V1MO	GS4M30HP230V1MO	GS4M36HP230V1MO	GS5M42HP230V1MO	GS5M48HP230V1MO	GS6M60HP230V1MO
	Connectable Indoor Zones			2	2 - 3	2 - 4	2 - 4	2 - 5	2 - 5	2 - 6
	Refrigerant			R32	R32	R32	R32	R32	R32	R32
Performance - Non-Ducted Indoor Units	Cooling Capacity	Minimum - Maximum	Btu/h	7,300 - 19,800	7,500 - 31,400	8,190 - 34,100	8,870 - 40,900	8,870 - 44,300	8,870 - 49,133	8,870 - 61,000
	Rated Cooling Capacity	@95°F	Btu/h	18000	24000	28400	36000	42000	48000	55000
	Heating Capacity		Btu/h	7,300 - 18,100	7,500 - 31,400	8,190 - 40,900	8,870 - 51,180	8,870 - 54,592	8,870 - 54,592	8,870 - 62,000
	Rated Heating Capacity	@47°F	Btu/h	18000	24000	30000	36000	42000	48000	55000
	Low-Ambient Heating Capacity	@17°F	Btu/h	16000	23600	28000	36000	40000	40000	41000
	Extreme-Low-Ambient Heating Capacity	@5°F	Btu/h	13800	21600	27000	36000	37800	37800	36400
	SEER2			21	21	21	21	21	21	21
	EER2			12	13.3	13.6	12	13	12	11.65
	HSPF2			10	10	10	10	10	10	10
	COP	@5°F		2	2	2.07	2.1	2.1	2.1	2.1
Performance - Ducted Indoor Units	Cooling Capacity	Minimum - Maximum	Btu/h	7,300 - 19,800	7,500 - 31,400	8,190 - 34,100	8,870 - 40,900	8,870 - 44,300	8,870 - 49,133	8,870 - 61,000
	Rated Cooling Capacity	@95°F	Btu/h	18000	24000	28400	36000	42000	48000	55000
	Heating Capacity	Minimum - Maximum	Btu/h	7,300 - 18,100	7,500 - 31,400	8,190 - 40,900	8,870 - 51,180	8,870 - 54,592	8,870 - 54,592	8,870 - 62,000
	Rated Heating Capacity	@47°F	Btu/h	18000	24000	30000	36000	42000	48000	55000
	Low-Ambient Heating Capacity	@17°F	Btu/h	15000	22000	27200	36000	40000	40000	40000
	Extreme-Low-Ambient Heating Capacity	@5°F	Btu/h	13600	21600	26000	33000	36000	36000	31000
	SEER2			18	18	18	18	18	18	19
	EER2			11.7	12	12	11.7	12	11.7	11.7
	HSPF2			8.1	8.1	8.1	8.1	8.1	8.1	8
	COP	@5°F		1.86	1.86	1.88	1.9	1.9	1.9	2.3
Performance - Mixed Indoor Units	Cooling Capacity	Minimum - Maximum	Btu/h	7,300 - 19,800	7,500 - 31,400	8,190 - 34,100	8,870 - 40,900	8,870 - 44,300	8,870 - 49,133	8,870 - 61,000
	Rated Cooling Capacity	@95°F	Btu/h	18000	24000	28400	36000	42000	48000	55000
	Heating Capacity	Minimum - Maximum	Btu/h	7,300 - 18,100	7,500 - 31,400	8,190 - 40,900	8,870 - 51,180	8,870 - 54,592	8,870 - 54,592	8,870 - 62,000
	Rated Heating Capacity	@47°F	Btu/h	18000	24000	30000	36000	42000	48000	55000
	Low-Ambient Heating Capacity	@17°F	Btu/h	15400	23000	27600	36000	40000	40000	40000
	Extreme-Low-Ambient Heating Capacity	@5°F	Btu/h	13700	21600	26400	34000	37000	37000	32000
	SEER2			19	19	19	19	19	19	20
	EER2			11.8	12.2	12.2	11.8	12.2	11.8	11.8
	HSPF2			9	9	9	9	9	9	9
	COP	@5°F		1.8	1.8	1.81	1.84	1.84	1.84	2.2
Outdoor Unit Data	Cooling Operating Range		°F	-22 - 118	-22 - 118	-22 - 118	-22 - 118	-22 - 118	-22 - 118	-22 - 118
	Heating Operating Range		°F	-22 - 75	-22 - 75	-22 - 75	-22 - 75	-22 - 75	-22 - 75	-22 - 75
	Compressor Type			GREE / Double Cylinder / 1-Stage Inverter	GREE / Double Cylinder / 1-Stage Inverter	GREE / Double Cylinder / 1-Stage Inverter	GREE / Double Cylinder / 1-Stage Inverter	GREE / Double Cylinder / 1-Stage Inverter	GREE / Double Cylinder / 1-Stage Inverter	GREE / Double Cylinder / 1-Stage Inverter
	Outdoor Sound Pressure Level		dB(A)	51	55	58	59	59	59	59
	Outdoor Unit Dimensions	W × H × D	in	32-23/64 × 21-42/64 × 13-55/64	37-61/64 × 25-63/64 × 15-53/64	40-10/64 × 32-33/64 × 16-52/64	40-10/64 × 32-33/64 × 16-52/64	40-10/64 × 32-33/64 × 16-52/64	40-10/64 × 32-33/64 × 16-52/64	38-55/64 x 49-49/64 x 16-7/32
	Outdoor Package Dimensions	W × H × D	in	34-21/64 × 24-26/64 × 15-43/64	40 40/64 × 29-1/64 × 17-61/64	43 2/64 × 34 54/64 × 19 36/64	43-1/32 × 34-27/32 × 19-9/16	43-1/32 × 34-27/32 × 19 36/64	43 2/64 × 34 54/64 × 19 36/64	40-43/64 x 55-5/16 x 17-7/16
	Outdoor Net Weight		lbs	78.3	112.5	145.5	173.1	174.2	174.2	224.9
	Outdoor Gross Weight		lbs	84.9	122.4	161	188.5	189.6	189.6	251.4
Refrigerant & Piping	Refrigerant Charge	R32	oz	31.752	59.976	77.616	95.256	95.256	95.256	112.88
	Additional Refrigerant Charge	Per extra line length	oz/ft	0.2	0.2	0.2	0.2	0.2	0.2	0.2
	Port A Line Connection Size	Liquid / Gas	in	1/4 - 3/8	1/4 - 3/8	1/4 - 3/8	1/4 - 3/8	1/4 - 3/8	1/4 - 3/8	1/4 - 1/2
	Port B Line Connection Size	Liquid / Gas	in	1/4 - 3/8	1/4 - 3/8	1/4 - 3/8	1/4 - 3/8	1/4 - 3/8	1/4 - 3/8	1/4 - 1/2
	Port C Line Connection Size	Liquid / Gas	in	-	1/4 - 3/8	1/4 - 3/8	1/4 - 3/8	1/4 - 3/8	1/4 - 3/8	1/4 - 3/8
	Port D Line Connection Size	Liquid / Gas	in	-		1/4 - 3/8	1/4 - 3/8	1/4 - 3/8	1/4 - 3/8	1/4 - 3/8
	Port E Line Connection Size	Liquid / Gas	in	-				1/4 - 3/8	1/4 - 3/8	1/4 - 3/8
	Port F Line Connection Size	Liquid / Gas	in	-						1/4 - 3/8
	Factory Pre-Charged Line Length		ft	32.81	98.42	131.23	131.23	164	164	196.85
	Total Refrigerant Piping Length	Maximum	ft	131.23	196.85	262.46	262.46	328.08	328.08	393.7
	Maximum Line Length to Farthest Indoor Unit		ft	66	66	82	82	82	82	82
	Maximum Vertical Separation		ft	49	49	82	82	82	82	82
Electrical Requirements	Electrical Supply			208-230V / 1Ph / 60Hz	208-230V / 1Ph / 60Hz	208-230V / 1Ph / 60Hz	208-230V / 1Ph / 60Hz	208-230V / 1Ph / 60Hz	208-230V / 1Ph / 60Hz	208-230V / 1Ph / 60Hz
	Voltage Range	Minimum - Maximum	VAC	187 - 253	187 - 253	187 - 253	187 - 253	187 - 253	187 - 253	187 - 253
	Cooling Rated Current		A	11	14	20	21.7	21.7	21.7	28.5
	Heating Rated Current		A	11	14.8	21.7	22.6	22.6	22.6	30
	Maximum Overcurrent Protection		A	20	25	30	35	35	35	40
	Minimum Circuit Ampacity		A	14.5	19.5	23	30	30	30	37.5
	Main Power Cable Size		AWG	Refer to Local Electrical Code	Refer to Local Electrical Code	Refer to Local Electrical Code	Refer to Local Electrical Code	Refer to Local Electrical Code	Refer to Local Electrical Code	Refer to Local Electrical Code
	Indoor/Outdoor Interconnecting Cable		AWG	14 AWG 4-conductor stranded cable	14 AWG 4-conductor stranded cable	14 AWG 4-conductor stranded cable	14 AWG 4-conductor stranded cable	14 AWG 4-conductor stranded cable	14 AWG 4-conductor stranded cable	14 AWG 4-conductor stranded cable
KEY FEATURES	Intelligent Preheating			YES	YES	YES	YES	YES	YES	YES
	Self Diagnosis			YES	YES	YES	YES	YES	YES	YES
	Compressor Electric Heater			YES	YES	YES	YES	YES	YES	YES
	Chassis Electric Heater			YES	YES	YES	YES	YES	YES	YES
	Intelligent Defrosting			YES	YES	YES	YES	YES	YES	YES
	Energy Saving			YES	YES	YES	YES	YES	YES	YES
	Low Voltage Startup			YES	YES	YES	YES	YES	YES	YES
	Indoor Unit A2L Refrigerant Leak Sensor			Pre-Installed at Factory	Pre-Installed at Factory	Pre-Installed at Factory	Pre-Installed at Factory	Pre-Installed at Factory	Pre-Installed at Factory	Pre-Installed at Factory

Multi-Zone ODU Model Numbers & SKU Reference
Capacity	Outdoor Unit (MO)	BTU/h	Max Indoor Units	SEER2	EER2	HSPF2	Refrigerant
18K	GS2M18HP230V1MO	18000	2	Up to 21.0	13.6	10	R32
24K	GS3M24HP230V1MO	24000	3	Up to 21.0	13.6	10	R32
30K	GS4M30HP230V1MO	30000	4	Up to 21.0	13.6	10	R32
36K	GS4M36HP230V1MO	36000	4	Up to 21.0	13.6	10	R32
42K	GS5M42HP230V1MO	42000	5	Up to 21.0	13.6	10	R32
48K	GS5M48HP230V1MO	48000	5	Up to 21.0	13.6	10	R32
60K	GS6M60HP230V1MO	60000	6	Up to 21.0	13.6	10	R32

Compatible Indoor Unit Types: Wall-mounted, Ducted, Cassette, Floor-Ceiling, and Air Handler units.
Key Specs: R32 refrigerant · Indoor capacity ratio 50%–150% (100%–135% recommended) · New G-Max outdoor units ~32% smaller than previous generation.

GREE R32 Multi-Zone Ductless Outdoor Unit (18K – 60K)

The GREE R32 Multi-Zone System connects one outdoor unit to multiple indoor units, delivering flexible room-by-room comfort, reduced outdoor clutter, easier installation, and reliable year-round performance.

More Comfort, Less Outdoor Clutter

Room-by-Room Comfort That Fits Your Home

Built-In Protection for Peace of Mind

Long-Reach Installation

-22°F Low-Temperature Operation

Intelligent Defrost Control

Whole-Home Zoning

More Compact Outdoor Design

Flexible Capacity Matching

Smarter System Protection

Corrosion-Resistant Build

Gree Climate Solutions LLC

627 Broadhollow Road, Melville, NY 11747, USA