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.
| DIMENSIONS & WEIGHT | |
|---|---|
| Net Dimensions (In) | 13.46 D 26.5 H 35.04 W |
| Net Weight (Lbs) | 99.87 |
| Gross Depth (In) | 18.11 |
| Gross Height (In) | 29.53 |
| Gross Width (In) | 40.55 |
| Gross Weight (Lbs) | 120.15 |
| GENERAL INFORMATION | |
| Color | White |
| Max Coverage Area | 800 |
| Inverter | Yes |
| Metering Device | EEV |
| CAPACITY & PERFORMANCE | |
| 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 |
| Cycle | 60 |
| Min Ambient Cool (F) | -22 |
| Min Ambient Heat (F) | -22 |
| COMPRESSOR & MOTORS | |
| Compressor Motor Type | Rotary |
| Condenser Fan Motor Rpm | 780/700/550 |
| NOISE LEVELS | |
| Decibel Rating (Dba) | 58 |
| ELECTRICAL REQUIREMENTS | |
| Voltage (V) | 208/230 |
| Phase | 1 |
| Max Fuse Breaker (A) | 25 |
| Min Circuit Ampacity (A) | 19 |
| REFRIGERANT & PIPING | |
| Refrigerant Type | R-454B |
| Refrigerant Volume (Oz) | 52.21 |
| Lineset Included | Yes |
| Line Set Length | 25ft |
| Max Lineset Length (Ft) | 75 |
| Liquid Line Size | 1/4 |
| Suction Line Size | 1/2 |
| CONTROLS & CONNECTIVITY | |
| Works With | DIYCASSETTE18HP-230D25-O DIY-18-HP-WMAH-230D25-O |
| SAFETY | |
| UL Listed | Yes |
| CSA Certified | Yes |
| ETL Certified | Yes |
| Energy Star Certified | Yes |
| AHRI Certified | Yes |
| Contains Electronics | Yes |
| Contains Chemicals | Yes |
| Contains Compressed Gas | Yes |
| Proposition 65 Warning | Yes |
| Restricted States |
|
| WARRANTY | |
| Registered Warranty | 7-Years Compressor, 5-Years Parts |
| Base Warranty | 5-Years Parts |
| Base Parts Warranty | 5 Years |
| Base Compressor Warranty | 7 Years |
The 5th Generation MRCOOL® DIY® 18k BTU Ductless Heat Pump Single Zone Mini-Split Air Handler delivers powerful, energy-efficient heating and cooling for spaces up to 800 sq. ft. Designed for easy, tool-free installation, this system requires no professional experience, specialized tools, or costly service calls—making it a fast and affordable comfort solution for homeowners.
This model features the rugged DIYPRO® cable, which eliminates the need for traditional electrical conduit while offering added durability and protection against outdoor elements, animals, and harsh weather conditions. Installation is not only simplified but also built to last. You can manage your comfort your way. Use the included wireless remote, connect through the SmartHVAC app available on iOS and Android devices, or control the system using voice commands via Amazon Alexa and Google Assistant. The Gold Fin® condenser coating enhances corrosion resistance, making the unit a great fit for coastal or high-humidity areas.
The system also includes advanced comfort features. Follow Me® technology senses the temperature around the remote and adjusts airflow accordingly, ensuring consistent comfort where you are. Dry Mode reduces humidity for better air quality and comfort. To protect your investment, MRCOOL® offers a strong 7-year compressor and 5-year parts warranty, and is also eligible for the MRCOOL® Care Program. Experience hassle-free installation, advanced features, and reliable year-round comfort with the MRCOOL® DIY® 18k Mini-Split Air Handler.
| DIMENSIONS & WEIGHT | |
|---|---|
| Dimensions | 8.9" D x 13.19" H x 42.52" W |
| 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 |
| GENERAL INFORMATION | |
| Mount Type | Wall |
| Color | White |
| Max Coverage Area | 800 sqft |
| Number of Speeds | 5 |
| Oscillation | Yes |
| Quiet Mode | Yes |
| CAPACITY & PERFORMANCE | |
| Tonnage | 1.5 |
| Cycle | 60 |
| NOISE LEVELS | |
| Decibel Rating Low (DBA) | 19 |
| Decibel Rating High (DBA) | 54.5 |
| ELECTRICAL REQUIREMENTS | |
| Voltage (V) | 208/230 |
| Phase | 1 |
| Max Fuse Breaker (A) | 15 |
| Min Circuit Ampacity (A) | 3 |
| REFRIGERANT & PIPING | |
| Liquid Line Size | 1/4 |
| Suction Line Size | 1/2 |
| FILTER & HEATING | |
| Filter Type | Reusable |
| Auxiliary Heater Included | No |
| Auxiliary Heater Available | No |
| CONTROLS & CONNECTIVITY | |
| Fan Only Option | Yes |
| Auto Cool | Yes |
| WIFI Compatibility | Yes |
| APP Compatibility | Yes |
| Works with IOS | Yes |
| Remote Control Included | Yes |
| SAFETY | |
| UL Listed | Yes |
| ETL Listed | Yes |
| AHRI Certified | Yes |
| Has Batteries | Yes |
| Contains Electronics | Yes |
| Contains Chemicals | Yes |
| Contains Aerosol | Yes |
| Contains Compressed Gas | Yes |
| Proposition 65 Warning | Yes |
| WARRANTY | |
| Registered Warranty | Extended Limited Lifetime* |
| Base Parts Warranty | 5 |
| Base Compressor Warranty | 7 |
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.
