MRCOOL DIY Gen 3 E-Star Ductless Mini Split AC with Heat Pump and Wireless-Enabled Smart Controller

MRCOOL DIY Gen 3 E-Star Ductless Mini Split AC with Heat Pump and Wireless-Enabled Smart Controller

MRCOOL Brand Product
$1,429.00 - $2,199.00

Availability: In stock

Lead time: Please select an option below


Comfort Made Simple - MRCOOL® 3rd Generation Enhanced DIY®

MRCOOL's third generation DIY heat pump air conditioner, the latest and greatest iteration of the only ductless mini-split system on the market explicitly designed for amateur installation, is now even more efficient, versatile and easy to install. You don't need special tools or training to install this high efficiency heat pump.

The MRCOOL DIY Gen 3 E-Star Ductless Mini Split AC with Heat Pump now comes with a 25 ft. line set that is all pre-charged with R410A refrigerant includes the quick connecting electrical cables. With an emphasis on top quality engineering, continual testing and taking consumer feedback to heart we have designed this system so that just about anyone can easily install a MRCOOL DIY in their home with no problem at all in only a few short hours.

Between the money you save by installing yourself and the rebates available for ENERGY STAR models, the MRCOOL DIY is the most cost efficient air conditioner on the market today. When appropriately sized this system is the ideal DIY solution for room comfort and with the factory installed low ambient cooling technology it's also the ideal DIY solution for server rooms, greenhouses and any other application that requires cooling all-year.

The MRCOOL DIY includes the new SmartHVAC Wi-Fi control module that features an easier setup process, improved functionality and works with Amazon Alexa and Google Assistant. If you want great air comfort without paying an arm and a leg for installation, you want an easy-to-use MRCOOL DIY Series ductless heat pump.

MRCOOL 3rd Gen DIY Features & Benefits

Easy DIY® Installation

Precharged 410 Quick Connect® Lineset

The included 25′ pre-charged lineset allows you to install this innovative ductless system without special tools, equipment, or training.

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 [NEW]

Enhanced Control from Anywhere

Control your MRCOOL DIY® anywhere with your Apple or Android smart device and an internet connection.

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.


AC Unit Sizing12,000 BTU18,000 BTU24,000 BTU36,000 BTU
Cooling Capacity12,000 BTU18,000 BTU24,000 BTU36,000 BTU
Heating Capacity12,000 BTU18,000 BTU25,000 BTU36,000 BTU
Indoor Noise Level23.5-38 dB(A)31-45 dB(A)33.5-47 dB(A)35-52 dB(A)
Power Supply115V, 60Hz, 1 Phase208-230v, 60Hz, 1 Phase208-230v, 60Hz, 1 Phase208-230v, 60Hz, 1 Phase
Minimum Circuit Amperage15A15A18A25A
Maximum Fuse20A20A30A50A
Refrigerant (oz)38.868.882.9119.9
Piping Size (Liquid-side, Gas-side)1/4", 1/2"1/4", 1/2"3/8", 5/8"3/8", 5/8"

Note: MRCOOL will not ship to Hawaii (HI). If you are in Hawaii, you will need to contact a freight forwarder.


MRCOOL DIY Gen 3 E-Star Ductless Mini Split AC with Heat Pump and Wireless-Enabled Smart Controller Videos


MRCOOL DIY Gen 3 E-Star Ductless Mini Split AC with Heat Pump and Wireless-Enabled Smart Controller Reviews

Easy set up
Much easier than I expected to get set up. I bought the 18K unit and it is working perfectly for my 4000w garden. I oversized in the hope that aI will expand my garden after the next run.

Works great!
I'm real glad I purchased it and it was not real hard to install. I would buy another one if I needed another one.

Good product
Works great, as advertised. I would recommend. Very quiet, great cooling.

Tech Specs