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The MRCOOL DIY 5th Gen 2-Zone is a ductless mini split heat pump that cools and heats two separate rooms from one outdoor condenser. It pairs a 6,000 BTU and a 9,000 BTU indoor head with pre-charged 35 ft line sets, so the refrigerant is sealed in and the job needs standard hand tools rather than a vacuum pump or brazing torch. Efficiency is high for a multi-zone DIY kit at up to 23.9 SEER2 and 10 HSPF2, and it keeps heating down to -13°F. It suits homeowners who want zoned comfort without paying an installer, though two heads mean more line to route and a bigger wall footprint than a single-zone unit.
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Owners of the MRCOOL DIY line generally report the pre-charged connections make a self-install feasible and praise quiet, strong cooling and heating. Common complaints center on the effort of routing and trimming line sets and on occasional issues that require support to resolve.
The MRCOOL DIY 5th Gen is a 2-zone ductless mini split that heats and cools two separate rooms. It is a heat pump and air conditioner in one system, with a total capacity of 15,000 BTU. One indoor unit is 6K BTU and the other is 9K BTU.
The two zones have independent temperature settings. The 6K unit covers an area up to 200 sq. ft. and the 9K unit covers an area up to 350 sq. ft.
It comes with 35 ft. pre-charged line sets and is designed for DIY installation. No HVAC certification or specialized equipment is needed, and standard hand tools are enough. It keeps heating in temperatures as low as -13°F.
