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The MRCOOL DIY 18K is a ductless mini split with a ceiling cassette head, sold as a heat pump that heats and cools. It is built for owner installation: the 25 ft line set comes pre-charged, so no vacuum pump or refrigerant gauges are needed. The inverter compressor and 22.5 SEER2 rating put efficiency near the top of the ductless class, and the SmartHVAC module adds app, Alexa and Google control. It suits a garage, sunroom or workshop up to about 800 sq ft where ducts are not an option; the ceiling cassette spreads air in four directions instead of one, which is its edge over a wall-mounted head.
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Lowest price we've seen: $3,418.00 on Nov 13 at The Home Depot. Tracked across 1 store since Nov 13.
Owners rate it very highly, with 23 ratings averaging 4.9 out of 5. Praise centers on the straightforward install and strong cooling, with few complaints.
The MRCOOL DIY 18K is a 5th generation ductless mini split that works as both an air conditioner and a heat pump. It has a ceiling cassette indoor unit and is designed so a homeowner can install it without a professional. It suits spaces without ductwork, such as garages, workshops, sunrooms, RVs and trailers.
The system comes with a pre-charged 25 ft line set. When appropriately sized, it is intended for an area of about 800 square feet. A DC inverter and variable speed compressor help keep operating costs down, and a refrigerant leakage detection feature helps the system keep running efficiently. The gold fin condenser resists corrosion, which suits coastal areas.
The included SmartHVAC Wi-Fi control module has a simple setup process. It works with Apple and Android smart devices, Amazon Alexa and Google Assistant.
