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The MRCOOL DIY 5th Gen E Star is a 9,000 BTU ductless mini split heat pump for single rooms up to about 400 sq. ft. It runs on 115V, uses R-454B refrigerant, carries ENERGY STAR certification, and comes as a complete system with a 25 ft. line set. Its main draw is pre-charged, quick-connect lines that let a handy homeowner install it without an HVAC technician, which sets it apart from most mini splits that require brazed lines and a licensed installer. It suits a garage, bedroom, addition or workshop where running ductwork is impractical.
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Owners of the MRCOOL DIY line generally report that the quick-connect setup installs as advertised and cools well for a single room. Complaints tend to center on installation details like the electrical hookup and on app connectivity.
The MRCOOL DIY 5th Gen ENERGY STAR 9,000 BTU Single Zone Mini Split is a ductless heat pump system for heating and cooling rooms up to 400 sq. ft. The system uses R-454B refrigerant, which has a lower Global Warming Potential than R-410A.
The 25 ft. Quick Connect line set is pre-charged, so setup is vacuum-free and tool-free. The DIYPRO cable removes the need for electrical conduit and protects against outdoor elements and wildlife. A step-by-step DIY guide and video support are included. The inverter adjusts output based on demand.
Control the system with the Smart HVAC app on iOS or Android, or by voice with Amazon Alexa or Google Assistant. With the Follow Me function, the remote acts as a thermostat and sets heating and cooling based on its location. Dry mode removes excess moisture. The Gold Fin condenser resists corrosion, and the system operates quietly.
