The 4th Generation MrCool DIY 36K BTU 4-Zone Ductless Split System is the latest in heat pump technology. The system is capable of producing an impressive 21.5 SEER efficiency rating. It also has the ability to heat even when temperatures drop to -13°F. It features robust construction which includes a Gold Fin Condenser coating so it is sure to withstand exposure to the elements. It features multiple modes of operation such as COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP so it is sure to suit your needs. It can also be conveniently operated from anywhere using your Apple or Android smartphone with the Smart HVAC app. For added peace of mind, this is the only condenser on the market that comes with a limited lifetime compressor warranty.  

THE MRCOOL DIY 4th Generation 36K BTU 4-Zone ductless mini-split 9k+9k+9k+12k is the only whole-home mini-split solution that you can INSTALL YOURSELF. Simple, easy air comfort in up to two zones.

Each 9k air handler is designed to heat and cool up to 375 square feet both efficiently and effectively.

Each 12k air handler is designed to heat and cool up to 500 square feet both efficiently and effectively.

Multi-Zone
One House, One Solution: Multi-zone technology gives you flexibility and control whenever and wherever you want it.

Easy DIY® Installation
Precharged R-410 Quick Connect® Line Set: Available in 16' and 25' options, pre-charged linesets allow you to install this innovative ductless system without special tools, equipment, or training.

New DIYPRO™ Cable
Safety & Durability: The included DIYPro™ Cable eliminates the need for electrical conduit providing higher mechanical protection and durability.

Follow Me® Function 
Personalized Performance: Keep the remote close by, and MRCOOL DIY ® will track the air temperature around you to ensure you receive maximum comfort.

Leakage Detection
Protecting Your Investment: When the MRCOOL DIY ® detects low coolant an alarm will sound to alert you to the problem. This will prevent damage to the compressor while you maintain high air comfort.

Low Ambient Cooling
Cooling Down to 5°F: This feature makes the MRCOOL DIY® the ideal system for server rooms, greenhouses, and any other application that requires cooling all year.

Auto Restart
Never Lift a Finger: Power outage? Don’t worry, the MRCOOL DIY® auto restart will have the unit running again in no time at all.

Sleep Mode
24-Hour Comfort: We made Sleep Mode easy to program to save money, and let you sleep a little easier.

Louver Position Memory
Remembers So You Don't Have To: Horizontal louver will automatically move to the same position as you set last time the unit was turned on.

Gold Fin® Condenser
Corrosion Resistant: Live on the coast? Don’t worry, our condenser is built to resist long term corrosion.

Digital Assistant Ready
Google Assistant & Amazon Alexa: The new MRCOOL® Smart HVAC Controller®Module and App fully support Google Assistant & Amazon Alexa out of the box.

Best Warranty in the Business
Limited Lifetime Compressor*, 7 Year Compressor Replacement*, 5 Year Parts
The DIY® 4th gen Multi-Zone comes with a LIMITED LIFETIME compressor warranty*, a 7-year compressor replacement* warranty, and a standard 5-year parts warranty for the original registered owner.

*If all indoor units (air handlers) run simultaneously, their combined BTU output will not exceed the BTU rating of the outdoor unit (condenser).

Specifications