The MRCOOL DIY 5th Generation Multi-Zone is the industry’s first true whole-home ductless HVAC system that can be installed by a homeowner. With pre-charged Quick Connect® line sets, you can heat and cool multiple rooms without hiring an HVAC professional.

Customize your 2-zone to match the way your home is actually used—bedrooms, living areas, sunrooms, basements, shops, and detached spaces. Every system uses factory-sealed line sets and advanced inverter technology to deliver quiet performance, lower energy bills, and reliable comfort in hot or cold climates.

Whether you’re upgrading an entire home, finishing a basement, remodeling a rental, or expanding a shop or office, MRCOOL Multi-Zone DIY systems provide the most reliable, future-ready HVAC solution available for true do-it-yourself installation.