Ductless Home Solution
MRCOOL
4th Gen DIY® Multi-Zone
Do-It-Yourself Heating & Cooling
BENEFITS & FEATURES
Comfort Made Simple
MRCOOL® 4th Generation Enhanced DIY®
Multi-Zone
Precharged R-410 Quick Connect® Line Set
Pre-charged linesets allow you to install this innovative ductless system without special tools, equipment, or training. Couplers are available for extended lengths. Check out our patent here.
Energy Star
Certified Efficiency
Going above and beyond for efficiency while maintaining optimum performance and reliability, the 12K, 18K and 24K models are Energy Star Certified.
Smartphone App
Enhanced Control from Anywhere
Control your MRCOOL DIY® anywhere with your Apple or Android smart device and an internet connection.
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* & 7 Yr Replacement* on Compressor + 5 Yr Parts
4th Gen DIY®s have an optional LIMITED LIFETIME compressor warranty*, a 7-year compressor replacement* warranty, and a standard 5-year parts warranty for the original registered owner. See rules and restrictions here.
Configure Your 4th Gen MRCOOL® DIY® System
Quick-Connect® Pre-Charged Line Set
Kink resistant for easier bending during installation
100% accurately precharged R-410A refrigerant
Standard lengths of 16ft and 25ft can be combined using optional DIY® Couplers for longer lengths
Simple to Use, Leak Proof, and Screw-on Quick Connect Valves do not require vacuuming
Quicker Installation than Conventional Line Sets
Strong UV protective insulation provides extra protection against sun damage, weather erosion, or destruction from animals or insects
Now Included: The DIYPro™ cable – a stronger electrical conduit that protects your cables from the weather and from gardening tools
Our Partners Succeed
with Innovative Reliable Products
4th Gen Brochure >
Installation Manual>
Remote Manual>
Smart HVAC Controller ® Manual >
Warranty Document >
NOTICE: MRCOOL® products must be installed in accordance with all applicable local, state and federal codes and regulations. Unless explicitly stated otherwise, installation must be completed by a licensed / certified HVAC technician. ALL electrical connections to a power source must be performed by a licensed electrician and comply with local, state and federal electrical codes and regulations.