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The MRCOOL DIY 5th Gen 2 Zone Mini Split is a ductless heat pump system with an 18,000 BTU outdoor condenser feeding two wall-mounted air handlers, a 6,000 BTU unit for rooms up to about 200 sq ft and a 9,000 BTU unit for up to about 400 sq ft. Its 23.9 SEER2 rating is high for a multi-zone system, and the pre-charged Quick Connect line sets with R-454B refrigerant let a homeowner install it without a vacuum pump, gauges or an HVAC license. Each zone has its own wireless remote and app control through the MRCOOL Smart Controller, with Alexa and Google Home support. It suits homeowners adding cooling and heating to two rooms without paying for a contractor install; against traditional multi-zone systems it trades some installer flexibility for simplicity, and owners say it runs quieter and cheaper than the quotes they got from HVAC companies.
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Lowest price we've seen: $2,921.24 on Nov 14 at The Home Depot; highest $3,306.00 on Oct 31. Tracked across 3 stores since Oct 31.
Owners rate it highly and focus on how manageable the DIY install is for a multi-zone system. They report quieter, more efficient operation than their old units and say it heats well even on sub-zero Minnesota nights.
This MRCOOL DIY 5th Gen is a two-zone ductless heat pump system. An 18,000 BTU condenser serves two indoor air handlers, one at 6,000 BTU and one at 9,000 BTU. It cools in summer, heats in winter and dehumidifies in wet seasons. It has a 23.9 SEER2 efficiency rating and uses DC inverter technology.
It is designed for DIY installation. Pre-Charged Quick Connect Line Sets come filled with R-454B refrigerant, so no vacuum pump, gauges or specialized tools are needed. The condenser has a Gold Fin coating that resists corrosion.
Each zone can be controlled with the MRCOOL Smart Controller app on iOS and Android, or by voice with Amazon Alexa and Google Home. Wireless remote controls are included. A front-panel LED display shows temperature, modes, alerts and error codes. Features include Sleep Mode, a timer, a Follow Me remote sensor, a low refrigerant alert, auto-restart after a power outage and air filter cleaning reminders.
