Single Zone • 4-Way Ceiling Cassette • R454B • 208–230V
Cooper&Hunter 18,000 BTU Single Zone Four-Way Ceiling Cassette w/ Humidity Sensor Minisplit Heat Pump System R454B 230V
Overview
An 18K four-way ceiling cassette pairing designed for even airflow, cleaner indoor air support, and efficient inverter operation. The CH-RH18MCT indoor cassette delivers omni-directional comfort through a 360° air flow panel and includes a built-in condensate pump. Paired with the CH-RES18-230VO regular outdoor unit for efficient, dependable heating and cooling.
Highlights
- Omni-directional airflow and 360° panel helps distribute air evenly throughout the room.
- Activated carbon filtration support for fresher indoor air.
- Anti-cold-air heating behavior reduces drafts during heat mode.
- Built-in pump with float switch (20.9" lift) for quiet condensate removal.
- Turbo operation, sleep mode, and multiple fan speeds for comfort tuning.
- Regular outdoor unit supports heating operation down to -13°F ambient.
Indoor Model
Outdoor Model
Line Set Size
1/4" Liquid • 1/2" Gas
Outdoor SEER2
20.7
Max Line Length
98.4 ft
Low-Ambient Heating
Down to -13°F
What’s Included
- Indoor 4-way ceiling cassette: CH-RH18MCT
- Outdoor condenser: CH-RES18-230VO (Regular)
- Remote control (indoor control package)
- Ceiling Cassette Panel
- Built-in condensate pump with float switch (indoor)
- Smart Kit capability for app control (setup required)
Indoor Specs (CH-RH18MCT)
| Spec | Value |
|---|---|
| Refrigerant Type | R454B |
| System Type | Single Zone |
| BTU Rated | 18,000 |
| Power | 208–230V • 1Ph • 60Hz (Voltage Range: 187–253V) |
| SEER2 / EER2 | 20 / 12.5 |
| Dehumidification | 4.23 pints/day |
| Indoor Airflow (CFM) | 447.3 / 388.5 / 317.8 / 194.2 |
| Noise (dB(A)) | 44.5 / 41 / 27.5 (H/M/L) |
| Unit Dimensions (W×D×H) | 22.44 × 22.44 × 9.65 in |
| Net / Gross Weight | 35.27 / 41.89 lb |
| Refrigerant Piping | 1/4" Liquid • 1/2" Gas |
| Drain Pipe Diameter | 1" |
| Operating Range | Cooling: 60–90°F • Heating: 32–86°F |
| Minimum Circuit Ampacity | 3 A |
| Max Fuse | 15 A |
Outdoor Specs (CH-RES18-230VO)
| Spec | Value |
|---|---|
| Refrigerant Type | R454B |
| System Type | Single-zone unit |
| BTU Rated | 18,000 |
| Cooling Capacity (Min–Max) | 17,000 (7,000–19,000) BTU/h |
| Heating Capacity (Min–Max) | 20,000 (5,500–22,000) BTU/h |
| SEER2 / EER2 | 20 / 12.5 |
| HSPF2 (Region IV / V) | 10.5 / 8.2 |
| COP | 3.47 |
| Power | 208–230V • 1Ph • 60Hz (Voltage Range: 187–253V) |
| Max Pipe Length | 98.4 ft |
| Max Height Difference | 65.6 ft |
| Minimum Circuit Ampacity | 18 A |
| Max Fuse | 20 A |
| Outdoor Airflow | 1,765.8 CFM |
| Outdoor Noise | 59 dB(A) |
| Unit Dimensions (W×D×H) | 35.04 × 13.46 × 26.5 in |
| Net / Gross Weight | 92.59 / 100.31 lb |
| Ambient Temperature | Cooling: -13–122°F • Heating: -13–75°F |
| Additional Charge | 0.16 oz/ft (1/4" liquid line) |
Documents & Downloads
- Submittal Sheet: CH-RES18-230VO + CH-RH18MCT
- Submittal Sheet: CH-RES18-230VO + CH-PRO18MASTWM-230VI
- Submittal Sheet: CH-RES18-230VO + CH-RH18MASTWM-230VI
- Submittal Sheet: CH-RES18-230VO + CH-RS18MDT
- Outdoor Units Installation Manual (R454B)
- SlimDuct Leaflet (R454B)
- 120N Wire Controller — Uses & Installation Manual
- Ceiling Cassette Installation Manual (R454B)
- Ceiling Cassette Owner’s Manual (R454B)
- MultiZone Combination Guide — Hyper
- MultiZone Combination Guide — Regular
Important
- Professional installation is recommended.
- Match line set sizes to the equipment: 1/4" liquid and 1/2" suction.
- Verify the dedicated circuit is sized per equipment MCA and local code.
- For help choosing equipment, contact us: hvacsupplies.com/pages/contact • (800) 543-8933
FAQs
Does the indoor cassette include a condensate pump?
Yes. CH-RH18MCT includes a built-in pump with float switch (20.9" lift).
What line set sizes are required for this 18K cassette?
1/4" liquid line and 1/2" suction (gas) line.
How cold can the regular outdoor unit operate in heating?
CH-RES18-230VO supports heating operation down to -13°F ambient.
Can I control the system with an app?
Smart Kit capability supports app control through the C&H platform after setup.
Is a wall thermostat required?
No. Remote control operation is supported; a wall thermostat can be added if desired.














































































