MRCOOL DIY Mini-Split Series 5th Generation 27,000 BTU 2-Zone Wall Mounted 12K+18K Heat Pump System

The MRCOOL® DIY 5th Generation 27,000 BTU 2-Zone Mini-Split System is a powerful and flexible climate solution for homeowners looking to cool and heat two mid- to large-sized rooms. With one 12K and one 18K BTU wall-mounted air handler, this system provides targeted comfort and efficient performance—all without the need for professional installation.

This 5th Generation system includes:

• (1) 27k BTU Multi-Zone DIY® Condenser (DIY-MULTI4-27HP230D-O)

• (1) 12k BTU Wall-Mounted Air Handler (DIY-12-HP-WMAH-230D25-O)

• (1) 18k BTU Wall-Mounted Air Handler (DIY-18-HP-WMAH-230D25-O)

• (2) 25 ft DIY® Quick Connect® Line Sets (2xDIY25-1412-O)

Together, this configuration efficiently heats and cools up to 1,250 sq. ft., making it ideal for open-concept living spaces, master bedrooms, offices, or large individual rooms.

✅ UL Listed, ETL Listed, and AHRI Certified

🛠️ True DIY Installation

With MRCOOL®'s patented DIY® Quick Connect® line sets pre-charged with R-454B refrigerant, you won’t need vacuum pumps, gauges, or licensed contractors. Installation is straightforward and fast—connect, tighten, and power on.

🌿 Eco-Friendly & Energy Efficient

Designed with the environment and your wallet in mind, this system features high SEER2 efficiency ratings and uses R-454B, a next-generation refrigerant with reduced environmental impact. Expect lower utility bills and consistent comfort.

📱 Smart Home Ready

Enjoy flexible comfort control with:

• SmartHVAC app for iOS & Android

• Amazon Alexa & Google Assistant compatibility

• Wireless remote controls included

• Follow Me® mode that adjusts temperature based on the remote’s location

💧 Humidity Control for Better Air Quality

Both air handlers feature Dry Mode, helping maintain comfortable humidity levels while reducing the risk of mold and musty odors—especially useful in damp basements or humid climates.

🛡️ Built for Durability

The outdoor condenser is protected by a Gold Fin® anti-corrosion coating, making it ideal for all-weather and coastal environments. The included DIYPRO® cable ensures extra durability and protection from outdoor elements and wildlife.

🏆 Industry-Leading Warranty

• 7-Year Compressor Warranty

• 5-Year Parts Warranty

• Limited Lifetime Warranty available with MRCOOL® Care Program registration

 

⭐ This Mini-Split System Replaces the Following Models: DIY-MULTI3-27HP230C,DIY-12-HP-WMAH-230C25,DIY-18-HP-WMAH-230C25,2xDIY25-1412