The MRCOOL® DIY 5th Gen 48,000 BTU 4-Zone Mini-Split System offers powerful, customizable comfort for up to 2,000 sq. ft.—ideal for multi-room homes. It includes one 48k BTU condenser, three 9k BTU air handlers, one 18k BTU air handler, and four 25-ft pre-charged Quick Connect® line sets with eco-friendly R-454B refrigerant. Designed for fast, DIY installation—no vacuum or special tools needed—this system delivers up to 21.8 SEER2 and 10 HSPF2-4 efficiency. Enjoy smart features like app control, voice assistant compatibility, Follow Me® sensing, and Dry Mode. Built for long-term reliability with Gold Fin® protection, a DIYPRO® cable, and backed by a 7-year compressor and 5-year parts warranty, this system offers energy-efficient, flexible climate control—without the need for a pro.

Customize comfort across your home with the MRCOOL® DIY 4-Zone 48k BTU Multi-Zone Mini-Split System, designed for efficient, flexible temperature control and true DIY installation. This 5th Generation system is ideal for medium to large homes, bedrooms, offices, and bonus rooms, and includes:

• (1) 48k BTU Multi-Zone DIY® Condenser (DIY-MULTI6-48HP230D-O)

• (3) 9k BTU Wall-Mounted Air Handlers (3xDIY-09-HP-WMAH-230D25-O)

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

• (4) 25 ft DIY® Quick Connect® Line Sets (4xDIY25-1412-O)

Together, this configuration provides powerful and efficient heating and cooling for up to 2,000 sq. ft., making it the perfect solution for multi-room comfort with varied zone needs.

🛠️ True DIY Installation

This MRCOOL® DIY® system is made for homeowners—no professional tools or HVAC experience required. The pre-charged Quick Connect® line sets are filled with R-454B refrigerant, so there’s no vacuuming or handling refrigerant necessary. Just connect, tighten, and enjoy instant climate control—saving you time and installation costs.

🌿 Eco-Friendly & Efficient

The high-capacity 48k BTU condenser achieves an impressive 21.8 SEER2 efficiency and HSPF2-4 of 10, offering lower energy bills and reduced environmental impact. R-454B refrigerant is a next-generation, environmentally safer alternative, helping your home stay green and cool.

📱 Smart Home Integration

Take control of your comfort with a variety of smart features:

• SmartHVAC app for iOS & Android

• Voice compatibility with Amazon Alexa & Google Assistant

• Wireless remote for easy manual operation

• Follow Me® function senses the remote’s location for targeted temperature adjustment

💧 Built-In Humidity Control

Each 18k BTU air handler features Dry Mode, helping to regulate moisture levels and improve indoor air quality—especially useful in humid climates or damp spaces.

🛡️ Built to Last

The outdoor unit is protected by a Gold Fin® anti-corrosion coating, making it a durable option even in coastal or harsh-weather regions. The system also includes the rugged DIYPRO® cable, offering added protection from outdoor elements and wildlife.

🏆 Industry-Leading Warranty

• 7-Year Compressor Warranty

• 5-Year Parts Warranty

• Limited Lifetime Warranty with MRCOOL® Care Program registration.

⭐ This Mini-Split System Replaces the Following Models: DIY-MULTI5-48HP230C,3xDIY-09-HP-WMAH-230C25,DIY-18-HP-WMAH-230C25,4xDIY25-1412