| Indoor unit | CH-RS18MAHU |
| Refrigerant type | R454B |
| System type | Single Zone |
| BTU rated | 18,000 |
| Power source | 208-230V, 1Ph, 60Hz |
| Dehumidification value (pnt/day) | 3.57 |
| Voltage range (V) | 187-253 |
| Controller | wire controller + remote controller available |
| Refrigerant piping - liquid/gas side (inch) | 1/4"/1/2" |
| EER2 | 12 |
| SEER2 | 18 |
| Net/gross weight (lb) | 104.72/125.66 |
| Unit dimensions (WxDxH) | 17.52 x21.02 x 45 |
| Packing dimensions (WxDxH) | 20.87 x 26.57 x 48.62 |
| Operation range - heating | 32~86 |
| Operation range - cooling | 60~90 |
| Minimum circuit ampacity (A) | 3.5 |
| Max fuse (A) | 15 |
| Indoor noise level (H/M/L) | 42.5/37.5/30 |
| Indoor air flow | 618.0 / 576.8 / 529.7 / 488.5 |
| ESP range | 0-0.8 |
| Drainage pipe diameter (inch) | 3/4" |
| Filter dimensions (WxD) (inch) | field supply, the unit without filter 16x20 |
| Outdoor unit | CH-RES18-230VO |
| Refrigerant type | R454B |
| System type | Single-zone unit |
| BTU rated | 18,000 |
| Power source | 208-230V, 1Ph, 60Hz |
| Dehumidification value (pnt/day) | 3.09 |
| Voltage range (V) | 187-253 |
| Refrigerant piping - liquid/gas side (inch) | 1/4"/1/2" |
| EER2 | 12.5 |
| SEER2 | 20 |
| Net/gross weight (lb) | 92.59/100.31 |
| Unit dimensions (WxDxH) | 35.04 x 13.46 x 26.5 |
| Packing dimensions (WxDxH) | 39.17 x 15.67 x 29.13 |
| Minimum circuit ampacity (A) | 18 |
| Max fuse (A) | 20 |
| Outdoor noise level (H/M/L) | 59 |
| Outdoor air flow | 1,765.8 |
| Max. pipe length (ft) | 98.4 |
| HSPF2-5 | 8.2 |
| HSPF2-4 | 10.5 |
| Cooling capacity (Min/Max) (BTU/h) | 17,000 (7,000~19,000) |
| Refrigerant precharge | 25 |
| Max height difference between Indoor and Outdoor unit | 65.6 |
| Heating capacity (Min/Max) (Btu/h) | 20,000 (5,500~22,000) |
| COP | 3.47 |
| Ambient temperature - Heating (F) | -13~75 |
| Ambient temperature - Cooling (F) | -13 ~ 122 |
| Additional Refrigerant Charge 1/4 liquid line | 0.16 |
Overview
Cooper&Hunter 18,000 Btu Multi-Position Air Handler utilizing the new R454B refrigerant is a flexible and efficient HVAC solution designed for single-zone and multi-zone applications. Engineered for maximum comfort and adaptability, this unit supports both horizontal and vertical installation, making it suitable for a wide range of residential and light commercial layouts.
Built with advanced inverter technology when paired with compatible outdoor condensers, this air handler delivers energy-efficient performance rated up to 18.0 SEER2. Its Intelligent Air Flow system with a three-speed fan motor allows for automatic or manual adjustment of static air pressure, ensuring consistent and balanced airflow throughout the space.
Designed for reliability and long-term durability, the unit features TU1 copper tubing with an aluminum coil for optimal heat transfer. Smart functions such as Anti-Cold Air protection, Fast Cool/Heat mode, Auto Restart, and Refrigerant Leak Detection enhance both comfort and system safety. Additional features like a built-in drain pan heater (system dependent) and coil-cleaning dust reversal function help maintain efficiency and reduce maintenance needs over time.
Control options include a built-in Smart Kit with app connectivity, an included remote control, wall thermostat compatibility, and a wired controller for flexible system management.
Features
- 18,000 Btu multi-position air handler for single-zone or multi-zone systems
- Supports horizontal and vertical installation configurations
- R454B refrigerant for improved environmental performance
- Up to 18.0 SEER2 efficiency rating when paired with compatible systems
- Intelligent Air Flow with 3-speed fan motor
- Automatic or manual static pressure adjustment
- Anti-Cold Air Function prevents cold air discharge at startup
- Fast Cool/Heat Function for rapid temperature response
- Auto Restart Function after power interruption
- Refrigerant Leak Detection for added system protection
- TU1 copper tubing with aluminum coil for efficient heat exchange
- Built-in coil cleaning function via fan reversal for dust removal
- Smart Kit enabled with app-based remote control
- Compatible with remote control, wall thermostat, and wired controller
- Designed for efficient, low-maintenance operation
What’s Included
- 18K Multi-Position Air Handler Unit
- Outdoor Condenser
- 30A Fused Disconnected
- Non-Metallic Wire Connectors
- 20A Dual Element Fuse (Pack of 2)
- Condenser Pad
Specifications
| Indoor unit | CH-RS18MAHU |
| Refrigerant type | R454B |
| System type | Single Zone |
| BTU rated | 18,000 |
| Power source | 208-230V, 1Ph, 60Hz |
| Dehumidification value (pnt/day) | 3.57 |
| Voltage range (V) | 187-253 |
| Controller | wire controller + remote controller available |
| Refrigerant piping - liquid/gas side (inch) | 1/4"/1/2" |
| EER2 | 12 |
| SEER2 | 18 |
| Net/gross weight (lb) | 104.72/125.66 |
| Unit dimensions (WxDxH) | 17.52 x21.02 x 45 |
| Packing dimensions (WxDxH) | 20.87 x 26.57 x 48.62 |
| Operation range - heating | 32~86 |
| Operation range - cooling | 60~90 |
| Minimum circuit ampacity (A) | 3.5 |
| Max fuse (A) | 15 |
| Indoor noise level (H/M/L) | 42.5/37.5/30 |
| Indoor air flow | 618.0 / 576.8 / 529.7 / 488.5 |
| ESP range | 0-0.8 |
| Drainage pipe diameter (inch) | 3/4" |
| Filter dimensions (WxD) (inch) | field supply, the unit without filter 16x20 |
| Outdoor unit | CH-RES18-230VO |
| Refrigerant type | R454B |
| System type | Single-zone unit |
| BTU rated | 18,000 |
| Power source | 208-230V, 1Ph, 60Hz |
| Dehumidification value (pnt/day) | 3.09 |
| Voltage range (V) | 187-253 |
| Refrigerant piping - liquid/gas side (inch) | 1/4"/1/2" |
| EER2 | 12.5 |
| SEER2 | 20 |
| Net/gross weight (lb) | 92.59/100.31 |
| Unit dimensions (WxDxH) | 35.04 x 13.46 x 26.5 |
| Packing dimensions (WxDxH) | 39.17 x 15.67 x 29.13 |
| Minimum circuit ampacity (A) | 18 |
| Max fuse (A) | 20 |
| Outdoor noise level (H/M/L) | 59 |
| Outdoor air flow | 1,765.8 |
| Max. pipe length (ft) | 98.4 |
| HSPF2-5 | 8.2 |
| HSPF2-4 | 10.5 |
| Cooling capacity (Min/Max) (BTU/h) | 17,000 (7,000~19,000) |
| Refrigerant precharge | 25 |
| Max height difference between Indoor and Outdoor unit | 65.6 |
| Heating capacity (Min/Max) (Btu/h) | 20,000 (5,500~22,000) |
| COP | 3.47 |
| Ambient temperature - Heating (F) | -13~75 |
| Ambient temperature - Cooling (F) | -13 ~ 122 |
| Additional Refrigerant Charge 1/4 liquid line | 0.16 |
Details
Overview
Cooper&Hunter 18,000 Btu Multi-Position Air Handler utilizing the new R454B refrigerant is a flexible and efficient HVAC solution designed for single-zone and multi-zone applications. Engineered for maximum comfort and adaptability, this unit supports both horizontal and vertical installation, making it suitable for a wide range of residential and light commercial layouts.
Built with advanced inverter technology when paired with compatible outdoor condensers, this air handler delivers energy-efficient performance rated up to 18.0 SEER2. Its Intelligent Air Flow system with a three-speed fan motor allows for automatic or manual adjustment of static air pressure, ensuring consistent and balanced airflow throughout the space.
Designed for reliability and long-term durability, the unit features TU1 copper tubing with an aluminum coil for optimal heat transfer. Smart functions such as Anti-Cold Air protection, Fast Cool/Heat mode, Auto Restart, and Refrigerant Leak Detection enhance both comfort and system safety. Additional features like a built-in drain pan heater (system dependent) and coil-cleaning dust reversal function help maintain efficiency and reduce maintenance needs over time.
Control options include a built-in Smart Kit with app connectivity, an included remote control, wall thermostat compatibility, and a wired controller for flexible system management.
Features
- 18,000 Btu multi-position air handler for single-zone or multi-zone systems
- Supports horizontal and vertical installation configurations
- R454B refrigerant for improved environmental performance
- Up to 18.0 SEER2 efficiency rating when paired with compatible systems
- Intelligent Air Flow with 3-speed fan motor
- Automatic or manual static pressure adjustment
- Anti-Cold Air Function prevents cold air discharge at startup
- Fast Cool/Heat Function for rapid temperature response
- Auto Restart Function after power interruption
- Refrigerant Leak Detection for added system protection
- TU1 copper tubing with aluminum coil for efficient heat exchange
- Built-in coil cleaning function via fan reversal for dust removal
- Smart Kit enabled with app-based remote control
- Compatible with remote control, wall thermostat, and wired controller
- Designed for efficient, low-maintenance operation
What’s Included
- 18K Multi-Position Air Handler Unit
- Outdoor Condenser
- 30A Fused Disconnected
- Non-Metallic Wire Connectors
- 20A Dual Element Fuse (Pack of 2)
- Condenser Pad
Submittals
Frequently Asked Questions
Who do you sell to?
We sell exclusively to licensed HVAC contractors and industry professionals. Professional installation by a licensed technician is recommended to ensure proper installation, system performance, code compliance, and maximum manufacturer warranty coverage.
What brands do you carry?
We specialize in high performance brands like Cooper and Hunter along with ductless and mini split systems that meet California low GWP and energy compliance standards. We also stock trusted installation and service brands including NAVAC, RectorSeal, Fieldpiece, Armbridge, Olmo, and Diversitech.
Do you stock equipment locally?
Yes. We have a ton of equipment and accessories in stock across the Bay Area and Sacramento, available for local pickup or freight shipping. More locations coming soon.
Can I get help sizing a system?
Absolutely. We help contractors with equipment selection, line set sizing, refrigerant matchups, and other technical questions. Reach out via phone or email for support.
Do you offer volume discounts?
Yes. We offer contractor pricing and volume breaks for bulk orders. Reach out directly if you're planning a multi-unit install or need project pricing.
Do you help with warranty claims?
Yes, you will need to first reach out to the Cooper & Hunter Technical Support line 1 800-977-0722 to go through troubleshooting, and if it is determined to be a defective unit, we will work with the manufacturer and you as the customer to source you a replacement unit under warranty. If it is determined to need replacement parts, you as the customers will work with Cooper & Hunter to source replacement parts.
Can I buy online?
Yes. As long as you have a licensed contractor account with us, you can place orders online for delivery or pickup at any of our branch locations.
What makes CoolMan different?
We’re not just a supplier — we’re a partner. We know the ductless business, we understand California codes, and we move fast to help you win jobs and keep clients happy.
