Design Your Own MRCOOL® DIY® 3-Zone 5th Gen Multi Zone
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 3-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.
Why It Stands Out
Quick Connect® Line Sets
Pre-charged and pre-flared from the factory. Just connect and go — no specialty refrigerant tools required.
True Zone Control
Set a different temperature in every room. Each indoor head unit operates independently from a single outdoor condenser.
R454B Refrigerant
Next-generation low-GWP refrigerant — cleaner for the environment and future-proof for upcoming regulations.
Smart Home Ready
Built-in Wi-Fi lets you control all three zones from your phone. Compatible with Alexa and Google Home.
Year-Round Heat Pump
Efficiently heats and cools in a single system. Operates in low outdoor temperatures — no separate furnace needed.
Warranty-Backed DIY
MRCOOL's DIY line is specifically designed for homeowner installation without voiding manufacturer warranty coverage.
How Installation Works
- Choose your condenser and head units — Pick the right BTU condenser for your total square footage, then select a wall-mount head for each zone based on room size.
- Select your line set lengths — Measure the distance from your outdoor unit to each room. We'll include the right pre-charged line set for every zone.
- Mount the heads and run the lines — Hang each indoor unit, drill a pass-through hole, and feed the line set. No vacuuming or manifold gauges required.
- Connect the outdoor unit and power up — Snap the Quick Connect® fittings, wire the condenser to a dedicated circuit, and you're running — typically in a single weekend.
Everything Included
Your configured system ships complete — no surprise add-ons:
- Outdoor condenser unit
- 3 indoor wall-mount head units
- 3 pre-charged Quick Connect® line sets
- 3 wireless remotes
- Mounting hardware and brackets
- Built-in Wi-Fi module
- Full installation manual
- Free shipping + rebate eligibility information
Need help deciding which mini split system is right for you? We are here to help.
Talk with one of our trusted HVAC and Mini Split professionals today!
Call Us!
