Cooper&Hunter MES Series 18,000 BTU Outdoor Condenser, 230V, R454B - Ductless Mini Split Air Conditioner Heat Pump
Cooper & Hunter7-Yr WarrantySKU: CH-R18MES-230VO
Product specifications
- Voltage
- 230V
- SEER
- 25.1
- WiFi
- Not Included
- Type
- Outdoor Unit
- Freon
R454B
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COOPER & HUNTER · OUTDOOR UNIT
Built for year-round comfort
CH-R18MES-230VO
System Specs
| Cooling Capacity | 18,000 BTU/h |
|---|---|
| Heating Capacity | 19,000 BTU/h |
| SEER2 | 25.1 |
| EER2 | 14 |
| Voltage | 230V |
| Refrigerant | R454B |
|---|---|
| Compressor | Inverter |
| Climate Range | -13–122°F / -13–75°F outdoor ambient |
| Sound Level (indoor) | 59.5 dB(A) |
| Warranty | 7-Yr Compressor |
Product Description
The Cooper & Hunter 18,000 BTU outdoor condenser (CH-R18MES-230VO) is the outdoor half of a R454B ductless mini split heat-pump system. Pair it with compatible indoor units to build your system.
6 Modes for Maximum Comfort
Engineered to adapt to every season, every room, every need.
Maintain a comfortable indoor temperature by automatically switching between heating and cooling as needed. Ideal for year-round use.
WARRANTY
BACKED BY COOPER & HUNTER
Industry-leading protection on every unit
Compressor: 7-year coverage
With product registration after professional installation.
Parts & components: 5-year coverage
All major components and refrigerant circuit parts.
Technical Specifications
Outdoor Unit Specs— CH-R18MES-230VO
| Model | CH-R18MES-230VO |
|---|---|
| Unit Dimensions (WxDxH) | 35.04 x 13.46 x 26.50 in |
| Net/Gross Weight | 100.53/109.35 lb |
| Packing Dimensions (WxDxH) | 40.55 x 17.24 x 29.53 in |
| Power Supply | 208-230V, 1Ph, 60Hz |
| Maximum Fuse Size | 20 A |
| Min. Circuit Ampacity | 16 A |
| Copper Line Size (Liquid/Gas) | 3x1/4"- 3x3/8" |
| Noise Level | 59.5 dB |
| Airflow | 1,765.8 CFM |
| Dehumidification | 0.42 pt/h |
System Specs
| Cooling — Rated Capacity (Range) | 18,000 Btu/h (5,400–21,600) |
|---|---|
| Heating at 47°F — Rated Capacity (Range) | 19,000 Btu/h (5,700–21,600) |
| Rated Heating at 5°F | 13,500 Btu/h |
| SEER2 / EER2 | 25.1 / 14 |
| HSPF4 / HSPF5 / COP (47°F) | 9.8 / 7.8 / 3.8 |
| Outdoor Unit MCA / Max. Fuse | 16 A / 20 A |
| Max. Connectable Indoor Units | 3 |
| Outdoor Noise Level | 59.5 dB(A) |
| Outdoor Unit Dimensions (W×D×H) | 35.04 × 13.46 × 26.50 in |
| Outdoor Unit Net / Gross Weight | 100.53 / 109.35 lbs |
| Refrigerant Type / Charge | R454B / 61.73 oz |
| Pre-charged Line Length | 75 ft (add 0.16 oz/ft for 1/4 in liquid pipe / 0.32 oz/ft for 3/8 in liquid pipe) |
| Max. Total Pipe Length / Max. to One Indoor | 196.8 ft / 98.4 ft |
| Max. Height Difference (Indoor–Outdoor / Between Indoors) | 49.2 ft / 33 ft |
| Operating Range — Cooling / Heating | -13–122°F / -13–75°F outdoor ambient |
Series Comparison Table
Technical specifications for every model in the series — this product is one of them.
Indoor and Outdoor Hyper
| Specification | CH-R06MOLVWM-115VI | CH-R09MOLVWM-230VI | CH-R12MOLVWM-230VI | CH-R18MOLVWM-230VI | CH-R24MOLVWM-230VI | CH-R33HEMLVWM-230VI |
|---|---|---|---|---|---|---|
| Power Supply Rated | 208/230, 1, 60 | 208/230, 1, 60 | 208/230, 1, 60 | 208/230, 1, 60 | 208/230, 1, 60 | 208/230, 1, 60 |
| Rated Capacity Btu/h | 6,000 | 9,000 | 12,000 | 18,000 | 23,000 | 33,000 |
| Minimum Circuit Ampacity (MCA) A | 3 | 3 | 3 | 3 | 3 | 3 |
| Max. Fuse A | 3 | 3 | 3 | 3 | 3 | 3 |
| Indoor Air Flow (Turbo/Hi/Mi/Lo/Si) CFM | 294.3/225.4/176.8/141.3/NA | 382.6/293.1/194.2/153.0/NA | 382.6/293.1/194.2/153.0/NA | 759.3/530.4/419.1/382.6/NA | 759.3/586.5/419.1/382.6/NA | 829.6/716.6/592.7/447.3/NA |
| Indoor Noise Level (Turbo/Hi/Mi/Lo/Si) dB(A) | 42.0/37.0/32.0/24.0/NA | 42.0/37.0/32.0/24.0/NA | 43.0/37.0/32.0/24.0/NA | 52.5/44.0/40.5/35.2/25.0 | 54.5/49.0/45.3/41.3/27.0 | 56.0/49.5/45.3/41.3/27.0 |
| Dimension (WxDxH) inch | 28.7x7.87x11.81 | 31.5x7.87x11.61 | 31.5x7.87x11.61 | 45.47x12.01x16.14 | 45.47x12.01x16.14 | 52.76x15.16x17.72 |
| Packing (WxDxH) inch | 31.10x10.63x14.76 | 34.45x11.22x14.96 | 34.45x11.22x14.96 | 45.47x12.01x16.14 | 45.47x12.01x16.14 | 52.76x15.16x17.72 |
| Net/Gross Weight lbs. | 17.64/21.35 | 18.64/22.05 | 18.64/22.05 | 45.47/21.06 | 45.47/21.06 | 67.16/17.72 |
| Room temperature Cooling °F | 60~90 | 60~90 | 60~90 | 60~90 | 60~90 | 60~90 |
| Room temperature Heating °F | 32~86 | 32~86 | 32~86 | 32~86 | 32~86 | 32~86 |
| Liquid Side/Gas Side inch | 1/4" / 3/8" | 1/4" / 3/8" | 1/4" / 3/8" | 1/4" / 1/2" | 3/8" / 5/8" | 3/8" / 3/4" |
Specification
| Specification | CH-RVHP19M-230VO | CH-RVHP28M-230VO | CH-RVHP36M-230VO | CH-RVHP48M-230VO | CH-RVHP55M-230VO |
|---|---|---|---|---|---|
| Power Supply (V/Ph/Hz) | 208/230, 1, 60 | 208/230, 1, 60 | 208/230, 1, 60 | 208/230, 1, 60 | 208/230, 1, 60 |
| Operating Range (V) | 187-253 | 187-253 | 187-253 | 187-253 | 187-253 |
| Cooling Capacity (BTU/h) | 5,400~28,000 | 7,200~37,000 | 9,000~43,000 | 12,000~57,000 | 19,000~59,000 |
| SEER2 | 5.6 | 9.5 | 12 | 17.3 | 18.5 |
| EER | 15 | 12.5 | 13 | 12 | 12 |
| IEER | 25 | 23 | 23 | 23 | 22.2 |
| Heating Capacity (BTU/h) | 5,700~27,000 | 8,400~36,000 | 10,000~44,000 | 13,000~57,000 | 20,000~59,000 |
| HSPF2 | 6.5 | 9.1 | 11.5 | 17.3 | 20.1 |
| COP | 4 | 3.8 | 4 | 3.7 | 3.5 |
| SCOP | 10.4 | 10.5 | 10.7 | 11 | 10.5 |
| Power Input (W) | 8.5 | 8.5 | 8.5 | 9 | 8.5 |
| Air Flow (CFM) | 19,000 | 27,000 | 36,000 | 47,000 | 47,000 |
| Sound Level Indoor (dBA) | 17.5 | 30 | 37 | 37 | 39.5 |
| Sound Level Outdoor (dBA) | 20 | 35 | 40 | 40 | 40 |
| Weight Indoor (lbs) | 2,130.7 | 2,148.4 | 3,037.2 | 4,502.8 | 4,502.8 |
| Weight Outdoor (lbs) | 61.5 | 61 | 65 | 65 | 65 |
| Dimensions Indoor (in) | 37.24x16.14x31.89 | 37.24x16.14x31.89 | 38.58x16.34x38.39 | 37.48x16.34x52.48 | 37.48x16.34x52.48 |
| Dimensions Outdoor (in) | 42.91x19.68x34.84 | 42.91x19.68x34.84 | 45.08x19.68x42.52 | 43.11x19.49x58.27 | 43.11x19.49x58.27 |
| Shipping Weight Indoor/Outdoor (lbs) | 137.35/148.15 | 168.43/179.67 | 211.86/244.71 | 246.47/276.68 | 246.47/276.68 |
| Refrigerant Type/Amount (lbs) | R454B/78.31 | R454B/120.63 | R454B/134.04 | R454B/151.68 | R454B/151.68 |
| Fuse Size (A) | 75 | 100 | 125 | 150 | 150 |
| Wire Size (AWG) | 0.16 / 0.32 | 0.16 / 0.32 | 0.16 / 0.32 | 0.16 / 0.32 | 0.16 / 0.32 |
| Control Voltage (V) | 550/340 | 550/340 | 550/340 | 550/340 | 550/340 |
| Liquid Line | 3 x 1/4" | 4 x 1/4" | 5 x 1/4" | 6 x 1/4" | 6 x 1/4" |
| Suction Line | 3 x 3/8" | 3 x 3/8" + 1 x 1/2" | 3 x 3/8" + 2 x 1/2" | 4 x 3/8" + 2 x 1/2" | 4 x 3/8" + 2 x 1/2" |
| Max Line Length (ft) | 196.8 | 262.4 | 262.4 | 262.4 | 262.4 |
| Max Elevation Diff (ft) | 98.4 | 114.8 | 114.8 | 114.8 | 114.8 |
| Max Head Pressure (ft) | 49.2 | 49.2 | 49.2 | 49.2 | 49.2 |
| Max Suction Pressure (ft) | 33 | 33 | 33 | 33 | 33 |
| Operating Range Cooling (°F) | -22~122 | -22~122 | -22~122 | -22~122 | -22~122 |
| Operating Range Heating (°F) | -22~75 | -22~75 | -22~75 | -22~75 | -22~75 |
| Feature 1 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Feature 2 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Feature 3 | ✓ | ✓ | ✓ | ✓ | ✓ |
| Feature 4 | ✓ | ✓ | ✓ | ✓ | ✓ |
Indoor and Outdoor Regular
| Specification | CH-R060LVWM-115VI | CH-R09OLVWM-115VI | CH-R120LVWM-115VI | CH-RO9MOLVWM-230VI | CH-R12MOLVWM-230VI | CH-R18MOLVWM-230VI | CH-R24MOLVWM-230VI | CH-R30MELVWM-230VI | CH-R36MELVWM-230VI |
|---|---|---|---|---|---|---|---|---|---|
| Power Supply Rated | 115V, 1, 60 | 115V, 1, 60 | 115V, 1, 60 | 208/230, 1, 60 | 208/230, 1, 60 | 208/230, 1, 60 | 208/230, 1, 60 | 208/230, 1, 60 | 208/230, 1, 60 |
| Rated Capacity Btu/h | 7,000 | 9,000 | 12,000 | 9,000 | 12,000 | 18,000 | 24,000 | 30,000 | 36,000 |
| Minimum Circuit Ampacity (MCA) A | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Max. Fuse A | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Indoor Air Flow (Turbo/Hi/Mi/Lo/Si) CFM | 370/340/265/174/- | 378/340/265/174/- | 378/340/265/174/- | 382/294/194/153/- | 382/294/194/153/- | 759/530/419/382/- | 759/586/419/382/- | 871/716/547/447/- | 871/716/547/447/- |
| Indoor Noise Level (Turbo/Hi/Mi/Lo/Si) dB(A) | 44/40/35/26/- | 44/40/35/26/- | 44/40/35/26/- | 45/41/32/24/- | 45/41/32/24/- | 54/49/45/41/27 | 54/49/45/41/27 | 56/52/45/38/22 | 56/52/45/38/22 |
| Dimension (WxDxH) inch | 31.57x7.87x11.95 | 31.57x7.87x11.95 | 31.57x7.87x11.95 | 31.57x7.87x11.95 | 31.57x7.87x11.95 | 45.47x12.01x16.34 | 45.47x12.01x16.34 | 49.57x11.14x14.25 | 49.57x11.14x14.25 |
| Packing (WxDxH) inch | 34.92x13.27x24.02 | 34.92x13.27x24.02 | 34.92x13.27x24.02 | 34.92x13.27x24.02 | 34.92x13.27x24.02 | 42.91x19.09x34.84 | 42.91x19.09x34.84 | 42.91x19.09x34.84 | 42.91x19.09x34.84 |
| Net/Gross Weight lbs. | 18.64/22.05 | 18.64/22.05 | 18.64/22.05 | 18.64/22.05 | 18.64/22.05 | 45.47/21.06 | 45.47/21.06 | 67.16/17.72 | 67.16/17.72 |
| Room temperature Cooling °F | 60~90 | 60~90 | 60~90 | 60~90 | 60~90 | 60~90 | 60~90 | 60~90 | 60~90 |
| Room temperature Heating °F | 32~86 | 32~86 | 32~86 | 32~86 | 32~86 | 32~86 | 32~86 | 32~86 | 32~86 |
| Liquid Side/Gas Side inch | 1/4" / 3/8" | 1/4" / 3/8" | 1/4" / 3/8" | 1/4" / 3/8" | 1/4" / 3/8" | 1/4" / 1/2" | 3/8" / 5/8" | 3/8" / 5/8" | 3/8" / 5/8" |
Specification
| Specification | CH-R18MES-230VOThis model | CH-R28MES-230VO | CH-R36MES-230VO | CH-R48MES-230VO | CH-R60MES-230VO |
|---|---|---|---|---|---|
| Power Supply (V, Ph, Hz) | 208/230, 1, 60 | 208/230, 1, 60 | 208/230, 1, 60 | 208/230, 1, 60 | 208/230, 1, 60 |
| Voltage Range (V) | 187-253 | 187-253 | 187-253 | 187-253 | 187-253 |
| Cooling Rated Capacity (range) (Btu/h) | 5,400~21,600 | 7,200~32,000 | 9,000~42,000 | 12,000~55,000 | 19,000~62,000 |
| Cooling Rated Current (A) | 6 | 9.2 | 13.5 | 16.6 | 26.2 |
| EER2 | 14 | 13 | 12 | 12.5 | 10 |
| SEER2 | 25.1 | 25 | 24 | 24 | 22 |
| Heating Rated Capacity (range) (Btu/h) | 5,700~21,600 | 8,400~29,000 | 10,000~42,500 | 13,000~53,000 | 20,000~60,000 |
| Heating Rated Current (A) | 6.8 | 9.2 | 14 | 16.3 | 21 |
| Heating at 47°F COP (W/W) | 3.8 | 3.8 | 3.5 | 3.8 | 3.7 |
| HSPF4 | 9.8 | 9.5 | 9.5 | 10.3 | 9.5 |
| HSPF5 | 7.8 | 7 | 7 | 8 | 7.4 |
| Heating at 5°F Rated Capacity (Btu/h) | 13,500 | 19,000 | 26,000 | 36,000 | 39,000 |
| Minimum Circuit Ampacity (Outdoor unit) (A) | 16 | 23 | 30.5 | 40 | 40 |
| Max. Fuse (Outdoor unit) (A) | 20 | 25 | 35 | 45 | 45 |
| Outdoor Air Flow (Max) (CFM) | 1,765.8 | 2,130.7 | 2,148.4 | 4,502.8 | 4,502.8 |
| Outdoor Noise Level (Sound Pressure) (dB(A)) | 59.5 | 61 | 64.5 | 63 | 65 |
| Dimension (W×D×H) (inch) | 35.04x13.46x26.50 | 37.24x16.14x31.89 | 37.24x16.14x31.89 | 37.48x16.34x52.48 | 37.48x16.34x52.48 |
| Packing (W×D×H) (inch) | 40.55x17.24x29.53 | 42.91x19.68x34.84 | 42.91x19.68x34.84 | 43.11x19.49x58.27 | 43.11x19.49x58.27 |
| Net/Gross Weight (lbs) | 100.53/109.35 | 138.89/149.69 | 168.87/180.12 | 222.00/254.19 | 237.88/270.28 |
| Refrigerant Type/Charged (oz) | R454B/61.73 | R454B/84.66 | R454B/120.63 | R454B/148.15 | R454B/151.68 |
| Refrigerant Precharge (ft) | 75 | 100 | 125 | 150 | 150 |
| Additional Charge for Each (0.16 for 1/4 in liquid pipe / *0.32 for 3/8 in liquid pipe) (oz/ft) | 0.16 / 0.32 | 0.16 / 0.32 | 0.16 / 0.32 | 0.16 / 0.32 | 0.16 / 0.32 |
| Design Pressure (PSIG) | 550/340 | 550/340 | 550/340 | 550/340 | 550/340 |
| Refrigerant Piping Liquid Side (inch) | 3 x 1/4" | 4 x 1/4" | 5 x 1/4" | 6 x 1/4" | 6 x 1/4" |
| Refrigerant Piping Gas Side (inch) | 3 x 3/8" | 3 x 3/8" + 1 x 1/2" | 4 x 3/8" + 1 x 1/2" | 4 x 3/8" + 2 x 1/2" | 4 x 3/8" + 2 x 1/2" |
| Max. Pipe Length (ft) | 196.8 | 262.4 | 262.4 | 262.4 | 262.4 |
| Max. Length for One Indoor Unit (ft) | 98.4 | 114.8 | 114.8 | 114.8 | 114.8 |
| Max. Height Difference in Level (ft) | 49.2 | 49.2 | 49.2 | 49.2 | 49.2 |
| Max. Height Difference Between Indoor Units (ft) | 33 | 33 | 33 | 33 | 33 |
| Ambient Temperature Cooling (°F) | -13~122 | -13~122 | -13~122 | -13~122 | -13~122 |
| Ambient Temperature Heating (°F) | -13~75 | -13~75 | -13~75 | -13~75 | -13~75 |
| Certification: AHRI | ✔ | ✔ | ✔ | ✔ | ✔ |
| Certification: Energy Star | ✔ | ✔ | ✔ | ✔ | ✔ |
| Certification: NEEP | ✔ | ✔ | ✔ | ✔ | ✔ |
| Certification: ETL | ✔ | ✔ | ✔ | ✔ | ✔ |
Frequently asked questions.
What size mini split do I need for my space?
For an area of up to 850 sq ft, the Cooper & Hunter MES Series 18,000 BTU unit is ideal. This capacity effectively cools or heats medium-sized rooms, making it a suitable choice for living rooms or large bedrooms.
Can I install a mini split myself?
While it's possible to install the Cooper & Hunter MES 18,000 BTU system yourself, professional installation is recommended for optimal performance and efficiency. Keep in mind that proper installation ensures the unit operates at its rated SEER of 25.1.
Does the mini split come pre-charged with refrigerant?
Yes, the Cooper & Hunter MES Series comes pre-charged with R454B refrigerant for line sets of up to 25 ft. This feature simplifies installation, allowing you to get your system up and running efficiently.
What voltage does the Cooper & Hunter mini split require?
The Cooper & Hunter MES 18,000 BTU unit operates on 230V, which is standard for most residential mini-split systems. Ensure your electrical system can accommodate this voltage for proper functionality.
What warranty does Cooper & Hunter MES Series offer?
The Cooper & Hunter MES Series comes with a 5-year parts warranty and a 7-year compressor warranty, provided you register the unit within 30 days of purchase. This warranty ensures peace of mind with your investment.
What SEER rating do I need for energy efficiency?
The Cooper & Hunter MES Series boasts an impressive SEER rating of 25.1, making it an energy-efficient choice. For optimal savings, look for systems with a SEER rating of 16 or higher, which exceeds the federal minimum requirements.
Manufacturer Technical Support
Reach your brand's tech support team directly
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The Cooper & Hunter 18,000 BTU outdoor condenser (CH-R18MES-230VO) is the outdoor half of a R454B ductless mini split heat-pump system. Pair it with compatible indoor units to build your system.
Key Features
- Outdoor condenser (heat pump) — supports up to 3 indoor units
- 18,000 BTU nominal capacity
- Inverter heat pump — efficient cooling and heating
- R454B refrigerant, factory pre-charged

