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This is a two-zone ductless mini-split heat pump. A 36,000 BTU outdoor condenser feeds two 18,000 BTU wall air handlers, each rated for about 800 square feet. It runs in reverse for heating and is rated 23 SEER2. Its main draw is the DIY Quick Connect line sets: the condenser comes pre-charged, so a homeowner can do much of the install without a technician or specialty tools. That sets it apart from conventional multi-zone systems, which need a licensed installer to braze lines and charge refrigerant. The trade-off is that line sets are sold separately, and the 36K condenser tops out at five indoor units. Owners rate it well, though there are only 18 ratings so far.
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Only 18 ratings so far, averaging 4.7 out of 5. Buyers mostly praise the self-install process and the heating and cooling output. Few detailed complaints are on record.
The MRCOOL DIY 5th Gen Multi-Zone is a two-zone ductless mini-split heat pump that heats, cools and dehumidifies. It has a 36,000 BTU condenser and two 18,000 BTU indoor air handlers, each rated for 800 square feet. As a heat pump, it runs in reverse to pull heat from the outdoors in heating mode.
It is designed for self-installation without special tools or training. It uses MRCOOL's pre-charged Quick Connect line sets, which are sold separately, so no HVAC technician is needed. Video installation instructions are available. The system is a 100% sealed system with a Gold Fin condenser, a DC inverter and R-454B refrigerant.
Each indoor unit can be run with the included remote or the MRCOOL Smart Controller app for Apple or Android. It also works with Amazon Alexa and Google Home. The front display shows room temperature, troubleshooting codes and alerts, including a low-refrigerant alert that may indicate a leak. Modes include auto, drying, sleep (8-hour window), timer and a manual forced-cooling mode. Each unit can be muted to turn off the alert buzzer and the LED display. After a power outage, the system restarts with its previous settings. Air filter cleaning alerts are automatic.
