| Refrigerant type | R454B |
| System type | Single |
| Filter dimensions (WxD) (inch) | N/A |
| BTU rated | 18,000 |
| Power source | 115/208-230V,60Hz |
| Dehumidification value (pnt/day) | 3.80 |
| Voltage range (V) | 187-253 |
| Controller | 120N/24V |
| Refrigerant piping - liquid/gas side (inch) | 3/8" 3/4" |
| EER2 | 12.0 |
| SEER2 | 19.0 |
| Net/gross weight (lb) | 111.33/91.49 |
| Unit dimensions (WxDxH) | 20.28 x 15.71 x 36.54 |
| Packing dimensions (WxDxH) | 22.83 x 19.49 x 42.91 |
| Operation range - heating | 60~90 |
| Operation range - cooling | 60~90 |
| Minimum circuit ampacity (A) | 4 |
| Max fuse (A) | 15 |
| Indoor noise level (H/M/L) | 48.0/47/45/39 |
| Indoor air flow | 618.0 / 576.8 / 529.7 / 488.5 |
| ESP range | 0-0.8 In.W.G |
| Drainage pipe diameter (inch) | 3/4" |
Overview
The 18,000 Btu/h Cooper&Hunter CH-STM18AHU24V Stud Mount Air Handler is engineered for maximum installation flexibility. Its front-return design makes it ideal for installations in smaller spaces and apartments where mounting options are limited.
Featuring 24V communication, this air handler is fully cross-compatible with third-party outdoor units, including both cooling-only and heat pump systems. Its refrigerant flexibility further enhances compatibility, making it an ideal solution for replacement projects, system upgrades, or new installations requiring dependable performance and seamless integration.
Features
- 18,000 Btu/h stud mount air handler
- 24V communication for cross-compatibility with third-party outdoor units
- Compatible with both cooling-only and heat pump outdoor systems
- Front-return design suited for smaller spaces and apartments
- Refrigerant-flexible for broad system compatibility
- Ideal for replacement projects, system upgrades, and new installations
What's Included
- Stud Mount Air Handler Indoor Unit
Specifications
| Refrigerant type | R454B |
| System type | Single |
| Filter dimensions (WxD) (inch) | N/A |
| BTU rated | 18,000 |
| Power source | 115/208-230V,60Hz |
| Dehumidification value (pnt/day) | 3.80 |
| Voltage range (V) | 187-253 |
| Controller | 120N/24V |
| Refrigerant piping - liquid/gas side (inch) | 3/8" 3/4" |
| EER2 | 12.0 |
| SEER2 | 19.0 |
| Net/gross weight (lb) | 111.33/91.49 |
| Unit dimensions (WxDxH) | 20.28 x 15.71 x 36.54 |
| Packing dimensions (WxDxH) | 22.83 x 19.49 x 42.91 |
| Operation range - heating | 60~90 |
| Operation range - cooling | 60~90 |
| Minimum circuit ampacity (A) | 4 |
| Max fuse (A) | 15 |
| Indoor noise level (H/M/L) | 48.0/47/45/39 |
| Indoor air flow | 618.0 / 576.8 / 529.7 / 488.5 |
| ESP range | 0-0.8 In.W.G |
| Drainage pipe diameter (inch) | 3/4" |
Details
Overview
The 18,000 Btu/h Cooper&Hunter CH-STM18AHU24V Stud Mount Air Handler is engineered for maximum installation flexibility. Its front-return design makes it ideal for installations in smaller spaces and apartments where mounting options are limited.
Featuring 24V communication, this air handler is fully cross-compatible with third-party outdoor units, including both cooling-only and heat pump systems. Its refrigerant flexibility further enhances compatibility, making it an ideal solution for replacement projects, system upgrades, or new installations requiring dependable performance and seamless integration.
Features
- 18,000 Btu/h stud mount air handler
- 24V communication for cross-compatibility with third-party outdoor units
- Compatible with both cooling-only and heat pump outdoor systems
- Front-return design suited for smaller spaces and apartments
- Refrigerant-flexible for broad system compatibility
- Ideal for replacement projects, system upgrades, and new installations
What's Included
- Stud Mount Air Handler Indoor Unit
Manuals
Compatibility
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.
