Heat and cool up to 750 sq ft with R-454B efficiency, app + voice control, and zero-hassle DIY installation in hours.

Upgrade your home’s heating and cooling system with the 5th Gen MRCOOL DIY 18K BTU Single Zone Mini-Split Air Handler, designed for effortless DIY installation and year-round climate control in spaces ranging from 500 to 750 sq. ft. Engineered for efficiency, this system features advanced inverter technology, eco-friendly R-454B refrigerant, and smart home integration, ensuring superior comfort without the need for professional installation.

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

• DIY Installation: Specifically designed for amateur installation. No special tools or training are required.
• Smartphone App Control: Control via Apple or Android devices, using an internet connection.
• Quick Connect: Patented lines for simple installation without specialized tools.
• DIYPro Armored Cable: Includes future-proof cable, eliminating the need for electrical conduit.
• Louver Position Memory: Air handler's horizontal louver resets to the same position after powering on.
• Gold Fin Condenser: Corrosion-resistant condenser, ideal for coastal environments.
• Digital Assistant Ready: Fully supports Google Assistant and Amazon Alexa out of the box.
• Follow Me Function: Remote control tracks air temperature around you for optimal comfort.
• Auto Restart: The system restarts automatically after a power outage.

What's Included?

• MRCOOL DIY 5th Gen E Star 18K BTU Single Zone Mini Split Complete System
• 25ft. Line Set 230V

Download Resources

• Spec Sheet
• Quick Start Guide