MRCOOL DIY® Select 18,000 BTU Single Zone Mini Split System 230V

Professional climate control shouldn't come with a professional installation bill. The MRCOOL DIY Select 18,000 BTU Single Zone Mini-Split Heat Pump delivers year-round comfort to spaces up to 800 square feet, backed by inverter-driven efficiency, whisper-quiet operation, and the only pre-charged Quick Connect line set in its class. No vacuum pumps. No licensed contractors. No compromise. Four steps is all it takes: mount, connect, power on, and enjoy the kind of reliable, app-controlled comfort that used to cost twice as much to install.
System Capacity: 18,000 BTU heating and 17,000 BTU cooling output covers spaces up to 800 sq. ft., with a SEER2 rating of 17.3 and HSPF2-4 of 8.5 for year-round efficiency that keeps operating costs low.
DIY Quick Connect Line Set (11.5 ft): Factory pre-charged with R-454B refrigerant and sealed Quick Connect fittings, this included 11.5 ft line set eliminates the need for vacuum pumps, gauges, or refrigerant handling, making true homeowner installation possible from day one. Additional lengths (16 ft, 25 ft, 35 ft, and 50 ft) are available separately.
Inverter Technology: Variable-speed compressor operation continuously adjusts output to match your space's exact demand, reducing energy use and maintaining consistent temperatures without the on/off cycling of conventional systems.
Ultra-Quiet Performance: Indoor noise levels as low as 18.5 dB(A) in Sleep mode make this unit ideal for bedrooms, home offices, and any space where silence matters.
Smart Control via MRCOOL Comfort App: Adjust temperature, switch modes, build schedules, and monitor system performance from anywhere using the MRCOOL Comfort App, with added voice control through Amazon Alexa and Google Assistant.
Future-Ready Refrigerant: Charged with R-454B, a next-generation low-GWP refrigerant that meets emerging environmental standards and positions your system for long-term regulatory compliance.
Warranty and Care Program Coverage: Backed by a 2-year compressor warranty, a 1-year parts warranty.