Experience year-round comfort with the MRCOOL® DIY® 18k BTU 208/230V Hyper Heat 21.2 SEER Ductless Heat Pump Single Zone Mini Split Condenser—a high-performance solution designed for easy installation without the need for professional tools or experience. Perfect for spaces ranging from 500-800 sq. ft., this system is compatible with both our stylish wall-mounted air handlers and the discreet DIY® OuttaSight® Ceiling Cassette. Installation is quick and hassle-free, thanks to the 25-foot DIY® Quick Connect® line set, which comes pre-charged with eco-friendly R-454B refrigerant. No vacuum pump or gauges required. The included DIYPRO® cable adds extra durability, offering protection against outdoor elements, animals, and everyday wear. Control your comfort effortlessly with several convenient options: a handheld remote, the SmartHVAC mobile app for Apple and Android, or hands-free voice commands via Amazon Alexa and Google Assistant. The Gold Fin® condenser coating helps resist corrosion, making it a dependable option even in coastal climates. Advanced features enhance both convenience and efficiency. Auto-Restart resumes unit function after a power outage, Timer allows for customized operation based on your schedule, and Sleep maximizes energy usage while you sleep. For ultimate peace of mind, the MRCOOL® DIY® 18k BTU Hyper Heat Single Zone Mini Split includes a 7-year compressor and 5-year parts warranty following online registration. Give yourself additional protection with enrollment in the MRCOOL® Care Program, which includes a limited lifetime replacement program and an annual care kit for lasting performance and confidence.
| Net Dimensions (In) | 13.46 D 26.5 H 35.04 W |
| Net Weight (Lbs) | 99.87 |
| SEER2 | 21.5 |
| EER2 | 12.5 |
| HSPF2-4 | 11 |
| HSPF2-5 | 8.5 |
| CFM | 1765.8 |
| Tonnage | 1.5 |
| Cooling Capacity (BTU) | 18000 |
| Heating Capacity (BTU) | 18000 |
| Voltage (V) | 208/230 |
| Works With | DIYCASSETTE18HP-230D25-O DIY-18-HP-WMAH-230D25-O |
| Phase | 1 |
| Cycle | 60 |
| Max Fuse Breaker (A) | 25 |
| Min Circuit Ampacity (A) | 19 |
| Color | White |
| Max Coverage Area | 800 |
| Refrigerant Type | R-454B |
| Refrigerant Volume (Oz) | 52.21 |
| Decibel Rating (Dba) | 58 |
| Inverter | Yes |
| Min Ambient Cool (F) | -22 |
| Min Ambient Heat (F) | -22 |
| Lineset Included | Yes |
| Line Set Length | 25ft |
| Max Lineset Length (Ft) | 75 |
| Liquid Line Size | 1/4 |
| Suction Line Size | 1/2 |
| Compressor Motor Type | Rotary |
| Condenser Fan Motor Rpm | 780/700/550 |
| Metering Device | EEV |
| UL Listed | Yes |
| CSA Certified | Yes |
| ETL Certified | Yes |
| Energy Star Certified | Yes |
| AHRI Certified | Yes |
| Registered Warranty | 7-Years Compressor, 5-Years Parts |
| Base Warranty | 5-Years Parts |
| Base Parts Warranty | 5 Years |
| Base Compressor Warranty | 7 Years |
| Contains Electronics | Yes |
| Contains Chemicals | Yes |
| Contains Compressed Gas | Yes |
| Proposition 65 Warning | Yes |
| Restricted States | GU;PR;VI |
| Gross Depth (In) | 18.11 |
| Gross Height (In) | 29.53 |
| Gross Width (In) | 40.55 |
| Gross Weight (Lbs) | 120.15 |
The 5th Generation MRCOOL® DIY® 18K BTU Ductless Heat Pump Single Zone Mini-Split Air Handler is a powerful and efficient solution for heating and cooling spaces up to 800 sq. ft.
Designed with a true DIY installation in mind, this system eliminates the need for special tools or professional assistance, making setup fast, simple, and cost-effective. One of the standout features is the pre-charged 25-foot DIY® QuickConnect® line set, which comes pre-filled with R-454B refrigerant. This means there’s no need for vacuuming, cutting down on installation time and costs. Additionally, the included DIYPRO® cable removes the need for electrical conduit, providing added durability and protection against outdoor elements and wildlife. Controlling your system is effortless with multiple options to fit your lifestyle. Adjust settings using the wireless remote, the SmartHVAC app for Apple and Android devices, or hands-free voice commands through Amazon Alexa and Google Assistant.
Engineered for long-lasting performance, the Gold Fin® Condenser in the outdoor unit offers superior corrosion resistance, especially beneficial in coastal environments. For added comfort, the Follow Me function on the remote allows the air handler to monitor and adjust airflow based on the remote’s location, ensuring even temperature control. Dry Mode helps maintain a comfortable indoor environment by reducing excess humidity and condensation buildup. Backed by industry-leading warranties—including a limited lifetime warranty, a 7-year compressor warranty, and a 5-year parts warranty—the 5th Generation MRCOOL® DIY® is built for reliability. Enjoy smart features, easy installation, and dependable year-round comfort with this innovative ductless mini-split system.
|
Dimensions |
8.9" D x 13.19" H x 42.52" W |
|
Tonnage |
1.5 |
|
Voltage (V) |
208/230 |
|
Phase |
1 |
|
Cycle |
60 |
|
Max Fuse Breaker (A) |
15 |
|
Min Circuit Ampacity (A) |
3 |
|
Mount Type |
Wall |
|
Color |
White |
|
Max Coverage Area |
800 sqft |
|
Decibel Rating Low (DBA) |
19 |
|
Decibel Rating High (DBA) |
54.5 |
|
Number of Speeds |
5 |
|
Oscillation |
Yes |
|
Liquid Line Size |
1/4 |
|
Suction Line Size |
1/2 |
|
Filter Type |
Reusable |
|
Auxiliary Heater Included |
No |
|
Auxiliary Heater Available |
No |
|
Fan Only Option |
Yes |
|
Quiet Mode |
Yes |
|
Auto Cool |
Yes |
|
WIFI Compatibility |
Yes |
|
APP Compatibility |
Yes |
|
Works with IOS |
Yes |
| Works with Android | |
|
Remote Control Included |
Yes |
|
UL Listed |
Yes |
|
ETL Listed |
Yes |
| Energy Star Certified | |
|
AHRI Certified |
Yes |
|
Registered Warranty |
Extended Limited Lifetime* |
|
Base Parts Warranty |
5 |
|
Base Compressor Warranty |
7 |
|
Has Batteries |
Yes |
|
Contains Electronics |
Yes |
|
Contains Chemicals |
Yes |
|
Contains Aerosol |
Yes |
|
Contains Compressed Gas |
Yes |
|
Proposition 65 Warning |
Yes |
|
Net Weight (Lbs) |
35.49 |
|
Gross Depth (In) |
17.68 |
|
Gross Height (In) |
14.29 |
|
Gross Width (In) |
46.73 |
|
Gross Weight (Lbs) |
49.6 |
What BTU rating should I choose for my air handler?
| Air Handler BTU | Coverage Area/Room Size (Sq. Ft.)* |
| 6K |
Up to 200 Sq. Ft.
|
| 9K |
Up to 375 Sq. Ft.
|
| 12K | Up to 500 Sq. Ft. |
| 18K | Up to 750 Sq. Ft. |
| 24k | Up to 1,000 Sq. Ft. |
| 36k | Up to 1,500 Sq. Ft. |
*Ceiling height, insulation, and local climate may impact the coverage area. For example, an uninsulated room will require more power than a well insulated room.
