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The MRCOOL DIY Select 18,000 BTU is a ductless mini-split that heats and cools up to 800 sq ft on 230V power. Its selling point is true DIY installation: the 11.5 ft line set comes pre-charged with R-454B, so there is no vacuuming, and the 13 ft DIYPRO cable removes the need for electrical conduit. It is a single-zone system with a wall-mounted indoor unit, remote, app and Alexa/Google control. Against pro-installed brands like Mitsubishi and Daikin it trades some efficiency and multi-zone flexibility for self-installation, and owners of the DIY line generally report it works well when the line set is handled carefully.
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Owners of MRCOOL DIY systems generally report the pre-charged line set makes installation manageable for a careful DIYer, and that the unit cools and heats a room well. Complaints tend to center on the 230V wiring work and on line-set connections that need to be seated correctly.
The MRCOOL DIY Select is an 18,000 BTU, 230V ductless mini-split system that heats and cools. It includes a wall-mounted indoor unit and an outdoor condenser. It is designed for do-it-yourself installation and needs no special tools or HVAC certification.
The 11.5 ft Quick Connect line set is pre-charged with R-454B refrigerant, so no vacuuming is needed. The indoor unit comes with a 13 ft DIYPRO cable, which removes the need for electrical conduit. The condenser has a Gold Fin coating for corrosion resistance, and the system uses smart inverter technology.
The system heats and cools spaces up to 800 sq ft. It can be controlled with the included wireless remote, the MRCOOL Comfort app, Amazon Alexa or Google Assistant. It has Sleep, Dry and Auto modes.
