Easily heat or cool two rooms with smart zoning, quiet performance, and DIY setup that requires no special tools.

The MRCOOL DIY Multi-Zone 18,000 BTU Ductless Mini Split gives you powerful heating and cooling for two separate rooms, without hiring an HVAC pro. This dual-zone system includes two 9K BTU air handlers (each covering up to 350 sq ft), all pre-charged and ready to install with no special tools.

Perfect for homeowners, vacation rentals, or home offices, this system lets you control comfort in two rooms independently. You’ll get year-round climate control, smartphone app integration, and serious energy savings—all backed by MRCOOL’s industry-leading warranties.

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-410A Refrigerant
• Smartphone App Controls
• Lifetime Technical Support
• Follow Me Feature
• Low Ambient Cooling

What's Included?

• 1 x MRCOOL 18k DIY 5th Generation 3 Zone Multi-Zone Mini-Split Condenser 230v
• 2 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