Heat or cool three large zones with smart control, quiet comfort, and tool-free DIY installation that cuts HVAC costs.

The MRCOOL DIY Multi-Zone 55,000 BTU Mini Split delivers serious heating and cooling power to three large spaces—without needing a pro install. Each 18K air handler covers up to 800 sq ft, making this setup perfect for wide-open living areas, oversized rooms, or multi-room zones that need full control.

Designed for true DIYers, this system ships with a high-efficiency DC inverter, and smart features you can manage from your phone. No licenses. No expensive tools. Just plug, mount, and chill (or heat).

Note: Pricing doesn't include the Line Sets. Available to purchase separately. 

Coverage Area

Please refer to this coverage chart to determine the required BTUs for the area you wish to cool or heat.

• Square Feet: Up to 400 | BTU = 9K
• Square Feet: Up to 550 | BTU = 12K
• Square Feet: Up to 800 | BTU = 18K
• Square Feet: Up to 1050 | BTU = 24K
• Square Feet: Up to 1550 | BTU = 36K

Note about condenser sizes versus total air handler capacity: The total capacity of the combined air handlers may exceed the capacity of the condenser in certain configurations. While this provides more flexibility in your setup, you will need to either shut off one of your air handlers (zones) or reduce the output of all zones.

Features

• Easy DIY Installation
  
• Simple to Use
• Multi-room Comfort
• Energy Efficient DC Inverter
• 100% Sealed System
• Gold Fin Condenser
• Eco Safe R-454B Refrigerant
• Smartphone App Controls
• Lifetime Technical Support
• Follow Me Feature
• Low Ambient Cooling

What's Included?

• 1 x MRCOOL 27k DIY 5th Generation 4 Zone Multi-Zone Mini-Split Condenser 230v
• 3 x MRCOOL 9k DIY 5th Generation Mini-Split Air Handler 230v

Download Resources

• MRCOOL 5th Gen DIY Quick Start Guide
• MRCOOL Mini-Split Remote Control Owner’s Manual
• MRCOOL 5th Gen DIY Single Zone Varied CFM Coil Performance