MRCOOL 18k BTU 20 SEER Ductless DIY Mini-Split Heat Pump



Mr Cool ductless DIY mini-split heat pumps offer an ideal do-it-yourself air conditioning solution for indoor gardens. The 18k 20 SEER Systems feature an outdoor condenser and indoor air-handler that can be installed in a few quick steps, and they come with all of the components needed for setup including all necessary tubing, wall fittings and mounting hardware. These 3rd generation DIY AC units also feature a remote control as well as built-in smart that allow the system to be controlled from anywhere with a convenient smartphone app. Get this Energy Star certified DIY  ductless mini-split system for your indoor garden now with Free Shipping from HTG Supply!

  • Energy Star Certified
  • 18000 BTU Cooling
  • Cooling Capacity 750 ft²
  • Model# DIY-18-HP-230B
  • 5-year manufacturer warranty

More Info




MRCOOL 18k 20 SEER DIY Ductless Mini-Split Air Conditioner

Introducing the MRCOOL E Star DIY 3rd Gen 18k BTU 20 SEER Ductless Mini-Split Heat Pump. These are ductless mini-split heat pumps with enhanced WIFI engineered to make setup not only quick and easy, but the MRCOOL DIY E Star Series is flexible enough to be installed virtually anywhere without requiring specialized tools or expensive equipment. The 18,000 BTU unit is 20 SEER and designed to heat and cool up to 750 square feet efficiently and effectively. Our SmartHVAC app is compatible with Amazon Alexa and Google assistant. You can also control your DIY anywhere with your Apple or Android smart device with an Internet connection. Doing it yourself has never been easier with the new MRCOOL DIY E Star Series. This unit is shipped in two boxes.

View Owners Manual
View Quick Start Setup Guide
View Smart Controller Instructions

Energy Star Certified

  • Going above and beyond for efficiency while maintaining optimum performance and reliability, the 12K, 18K and 24K models are Energy Star Certified.

Leakage Detection

  • 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

  • This feature makes the MRCOOL DIY® the ideal system for server rooms, greenhouses, and any other application that requires cooling all year.

Auto Restart

  • Power outage? Don’t worry, the MRCOOL DIY® auto restart will have the unit running again in no time at all.

Louver Position Memory

Horizontal louver will automatically move to the same position as you set last time the unit was turned on.


Brand Mr Cool
Ship Weight 128.97 lbs
BTU Cooling 18,000
Volts 230
Cooling Capacity 750 ft²
Residential Yes
Product Weight 128.9700 lb
Dimensions L x W x H (in.) 14.2900 x 42.5200 x 27.6400 in



Weight 129 lbs

Product Category

Air – Water – CO2

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