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The MRCOOL DIY Select 18K is a single-zone ductless mini split that heats and cools, rated 18,000 BTU and 17.3 SEER2 on 230V power. It is the entry point of MRCOOL's DIY line: pre-charged Quick Connect line set and screw-on fittings let a handy homeowner install it with basic tools, no vacuum pump or gauges. It uses R454B refrigerant and suits a room or open area of roughly 600 to 800 sq ft. Against the pricier DIY series it gives up some efficiency and features, but keeps the tool-free installation that makes MRCOOL popular.
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Owners of MRCOOL DIY systems generally praise the Quick Connect install and reliable heating and cooling. The Select line is newer and draws fewer reports, but buyers see it as a way into ductless comfort at the lowest cost in the family.
This is a single-zone ductless mini split that cools and heats as an air conditioner and heat pump. It is a 1.5-ton, 230V system with an inverter-driven rotary compressor and a DC condenser fan motor. It uses R-454B refrigerant and is rated for areas of about 600 to 800 sq ft.
It is a DIY system with Quick Connect technology. The line set comes pre-charged and uses screw-on fittings, so installation needs no vacuum pump or specialized gauges. The included 11.5 ft line set suits back-to-back mounting, with the indoor air handler directly opposite the outdoor condenser on an exterior wall.
Built-in Wi-Fi compatibility lets you adjust temperature, set schedules and monitor performance. You can do this through the MRCOOL SmartHVAC app, Amazon Alexa or Google Assistant.
