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MrCool - E Star DIY 3rd Gen 18k BTU 20 SEER Ductless Mini-Split Heat Pump-208-230V/60Hz

$1,729 $1,556.10
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Energy Star 18K BTU Heat Pump Condenser & Wall Mount Air Handler 230 volt 20 SEER with Enhanced WiFi and 25ft Lineset


A MRCOOL DIY Series heat pump is the only ductless mini-split system on the market explicitly designed for amateur installation. You don't need special tools or training to install this high efficiency heat pump. These units come with linesets precharged with R410A refrigerant, the quick hook-up electrical connections, and the quality engineering mean just about anyone can install a MRCOOL DIY in their home with no problem at all in only a few short hours. If you want great air comfort without paying an arm and a leg for installation, you want an easy-to-use MRCOOL DIYSeries ductless heat pump.

2nd Generation MRCool DIY Unit Features

REMOTE APP: WiFi Control
Control your DIY anywhere with your Apple or Android smart device and an internet connection.

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.

Easy DIY Installation:
You can install this innovative ductless system without special tools, equipment, or training.

Auto Restart: Power outage? Don't worry, the MrCool DIY auto restart will have the unit running again in no time at all.

Temp Compensation: The system constantly monitors interior air temperature in order to deliver the maximum possible comfort.

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

Simple Connections: Precharged 410 Quick Connect Lineset. These unique linesets are a cinch to get working. You'll probably do it in less than 15 minutes.

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.

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

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

Warranty Manufacturer serviced warranty, 7 Year Compressor, 5 Year Parts.


  • WiFi Control w/ Remote Control App (WiFi Required) Control your system anywhere with an internet connection. The MRCOOL 2nd generation DIY offers the integration of the MRCOOL Remote App. Use your Apple or Android smart device to change modes, adjust temperature, alter fan speed, and more.
  • Two way draining connections further simplify installation and add flexibility.
  • Mr Cool DIY temperature compensation technology help keeps you comfortable in any weather conditions.
  • Unlike any other ductless heat pump on the market, the Mr Cool DIY Series is specifically designed for easy, simple installation.
  • Refrigerant leakage detection ensures your system remains operating efficiently without degradation due to undetected corrosion.
  • Quick Connect: Most people can't do their own electrical work, and that's why the quick electrical connections on the Mr Cool DIY are a feature many will appreciate.
  • Pre-charged Linesets: One of the most difficult aspects of typical heat pump installation is dealing with the refrigerant inside the coils. The Mr Cool DIY Series comes with 410 Quick Connect precharged linesets alleviating one major obstacle to amateur installation in a single stroke.


Installation kit: 16 feet quick connect pre-charge insulated line set,quick connect air handler wire to condenser,16 feet condensate drain.

Installation plate,clip anchor,screws.remote controller,wall sleeves,quick connect sound tape,line set wrapping tape,manuals,operation & installation.


Model: DIY-18-HP-C-230A, DIY-18-HP-WMAH-230A
Cooling Capacity 18000 BTU/h

Heating Capacity 18000BTU/h
HSPF 9.5

Indoor noise level: : (Hi/Mi/Lo) 45/-/29
Power supply 208-230,60,1 V~Hz.Ph
Min. Circuit Ampacity 15.0A
Max. Fuse 20.0A
Indoor Net Dimensions 37.99x8.46x12.56
Outdoor Net Dimensions 31.50x13.11x21.81
Indoor Packing Dimensions 41.14x12.01x15.94
Outdoor Packing Dimensions 36.22x15.35x24.21
Indoor Net Weight: 26.0lbs
Outdoor Net Weight: 80.5lbs
Indoor Gross Weight: 34.2lbs
Outdoor Gross Weight: 87.1lbs
Refrigerant: (R410A) 52.9oz
Piping Size: (Liquidside/Gasside) 1/4″-1/2″
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For up to 90 days, depending on the brand.


Please refer to our Shipping & Returns policy page for more detailed information.

All products sold on Growbuds are subject to the respective manufacturer’s warranty policy, which can be found on manufacturers websites or by contacting them. If your product fails in the remainder of our returns period, the manufacturer's warranty policy will prevail. In this case, send us an email at support@wegrowbuds.co and we will assist you in your warranty claim by helping you coordinate with the original manufacturer.

Our experienced commercial team has helped supply hundreds of indoor, outdoor and commercial greenhouses projects in Canada and the United States.

Looking to get a quick quote? Contact us at support@wegrowbuds.co or call at 1-877-900-2632 option 2 to talk with a Growbuds sales representative. Otherwise please fill out the quick form below and we will be in touch as soon as possible.

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Newark, DE 19713, United States

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Laval, QC H7L 2Z9, Canada

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10 Reasons To Trust Growbuds With Your Business

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We are here to help and want the best for you. Use our live chat, email us at support@wegrowbuds.co or call us at 1-877-900-2632 during business hours. We are always here for you.

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We only carry top American brands that back their products with full warranties and return policies of up to 90 days, depending on the brand.

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We want you to be absolutely secure that you're getting the best price with us, so we will not only match a lower price you find online before purchase, but will even refund you the difference up to a month after purchase.

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For Orders Over 99$

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