18,000 BTU MRCOOL DIY 5th Gen Energy Star 21.5 SEER2 Single Zone Wall Mount Mini Split Heat Pump System – R454B | 230V

Upgrade your home's comfort and efficiency with the MRCOOL® DIY® 5th Generation 18,000 BTU Mini Split System – a powerful, ENERGY STAR® certified solution designed for true do-it-yourself installation. Ideal for larger areas between 500 and 750 square feet, this single-zone ductless system delivers efficient, whisper-quiet heating and cooling without requiring professional tools or HVAC licensing.

Equipped with a 25-foot pre-charged Quick Connect® line set, the system uses R-454B refrigerant, which offers a reduced global warming potential (GWP) compared to older refrigerants. Its advanced inverter technology ensures precise temperature control, lower energy consumption, and extended component life by adjusting performance in real-time based on your environment.

Stay connected and in control with integrated Wi-Fi capabilities, allowing full system management from your smartphone using the MRCOOL SmartHVAC app, or through hands-free control with Amazon Alexa or Google Assistant. Whether you're upgrading a living room, open-concept space, or workshop, this system is built to deliver maximum comfort with minimal installation effort.

✅ Key Features:

• 18,000 BTU Capacity – Perfect for spaces between 500–750 sq. ft.

• ENERGY STAR® Certified – Optimized for energy savings and lower utility costs

• Easy DIY Installation – No need for HVAC tools or technician assistance

• 25ft Pre-Charged Line Set – Quick Connect® fittings with environmentally friendly R-454B refrigerant

• Inverter Technology – Delivers precise, efficient climate control while reducing energy usage

• Smart Home Integration – Compatible with Alexa, Google Assistant, and the MRCOOL SmartHVAC app

• Heating & Cooling in One Unit – Designed for dependable year-round performance

• Quiet Operation – Designed to operate with minimal indoor noise

• 7-Year Compressor & 5-Year Parts Warranty – Long-term peace of mind from a brand you trust

The MRCOOL DIY® 18K BTU Mini Split System is the perfect combination of performance, efficiency, and convenience—ideal for homeowners, renovators, and DIYers who want professional-grade results without professional installation.