Product overview
Design Your Own MRCOOL® DIY® 6-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 six rooms without hiring an HVAC professional.
Customize your 6-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.
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 of the six indoor head units 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 six 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 It Works
- Choose your condenser — pick the right BTU condenser for your total square footage (48K or 55K for six zones).
- Select an air handler for each zone based on room size.
- Select your line set lengths — measure the distance from the outdoor unit to each room; every zone gets its own pre-charged Quick Connect® line set.
- Mount, connect, and power up — no vacuum pump or manifold gauges required. Most owners finish in a weekend.
Everything Included
Your configured system ships complete — no surprise add-ons:
- Outdoor condenser unit
- 6 indoor wall-mount head units
- 6 pre-charged Quick Connect® line sets
- 6 wireless remotes
- Mounting hardware and brackets
- Built-in Wi-Fi
- Full installation manual
- Free shipping + rebate eligibility information
Build Your System Today
Free shipping on your complete system.
Financing available with Shop Pay or Paytomorrow.
Estimated delivery: 1–5 business days.
Not sure which BTU sizes or line set lengths you need? Call (888) 231-8920 and we’ll help you build the perfect system for your home.
In-stock systems ship fast and free with curbside freight delivery, typically arriving in 4–10 days. Please inspect each box at delivery and note any damage on the receipt before signing — it keeps any freight claim quick and simple.
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Complete Your System
See it done
Watch the full DIY install
Every step, start to finish — most homeowners wrap a single zone in a weekend.
