The MRCOOL® DIY® Select 18,000 BTU 230V Ductless Mini-Split Heat Pump System in a sleek matte black finish delivers powerful, energy-efficient heating and cooling for spaces up to 800 square feet, with a 17.3 SEER2 cooling rating and 8.5 HSPF2-4 heating efficiency. Built for true do-it-yourself installation, this complete system pairs the DIYS-18-HP-C-230A11-O outdoor condenser with the DIYS-18-HP-B-WMAH-230A13-O indoor air handler and includes a factory pre-charged 11.5-foot Quick Connect® line set with environmentally friendly R-454B refrigerant — no vacuum pumps, gauges, or HVAC experience required. Smart Wi-Fi control via the MRCOOL® Comfort app, Amazon Alexa and Google Assistant compatibility, Gold Fin® corrosion-resistant coating, and a 2-year compressor / 1-year parts warranty round out a reliable, year-round comfort solution.

Key Features

• Complete DIY® Mini-Split System: Includes the DIYS-18-HP-C-230A11-O outdoor condenser and DIYS-18-HP-B-WMAH-230A13-O indoor wall-mounted air handler — everything needed for single-zone comfort
• Powerful Heating & Cooling: 18,000 BTU capacity efficiently conditions spaces up to 800 square feet
• High-Efficiency Performance: 17.3 SEER2 cooling and 8.5 HSPF2-4 heating ratings for year-round energy savings
• True DIY® Installation: No specialized tools, HVAC certifications, or prior experience required
• Pre-Charged Quick Connect® Line Set: 11.5-foot line set factory pre-charged with R-454B refrigerant — no vacuum pump or refrigerant handling needed
• Eco-Friendly R-454B Refrigerant: Lower global warming potential for environmentally responsible operation
• 13-Foot DIYPRO® Cable: Replaces traditional electrical conduit while protecting wiring from moisture, pests, and outdoor exposure
• 230V Power Supply: 1.5-ton system designed for 230V/60Hz single-phase operation
• Smart Wi-Fi Control: MRCOOL® Comfort app enables remote temperature control, scheduling, and energy monitoring from anywhere
• Voice Assistant Compatible: Works with Amazon Alexa and Google Assistant for hands-free control
• Wireless Remote Included: Convenient on-the-spot adjustments without reaching for your phone
• Advanced Comfort Modes: Sleep Mode, Dry Mode, Auto Mode, and Fan-Only Mode for tailored indoor comfort
• Programmable Scheduling: Set custom on/off and temperature schedules to maximize efficiency
• Gold Fin® Condenser Coating: Enhanced corrosion resistance for durability in humid or coastal environments
• Inverter Technology: Variable-speed compressor for stable temperatures and reduced energy consumption
• Reusable Air Filter: Washable filter design reduces ongoing maintenance costs
• Matte Black Finish: Sleek, modern design that blends seamlessly into a wide range of interior styles
• Backed by Warranty: 2-year compressor warranty and 1-year parts warranty for added peace of mind