MrCool DIY 4th Gen E Star 18k BTU Ductless Mini Split Heat Pump Complete System 208-230V/60Hz
The MrCool E Star DIY 4th Gen 18k BTU Ductless Mini Split Heat Pump Complete System 208-230V/60Hz is the perfect solution to your home's heating and cooling needs. This system offers an Energy Star certified, 22 SEER efficiency rating and can heat and cool an area up to 750 sq. ft. The best feature of this system is the ease of installation it provides to the homeowner. With the included pre-charged 25 ft. line set, some hand tools, and a few hours of time, this entire system can be completely installed.
This system comes equipped with many functions that separate it from the rest. It has multiple operating modes, which include AUTO, HEAT, COOL, FAN-ONLY, DRY (dehumidification), and SLEEP. It also features the Follow Me function, which allows the system to continually adjust the room temperature based on where the hand-held remote controller is. Need to operate the system when you’re not at home? No problem. The MrCool system also has the capability of being operated with your smartphone with the use of the Smart HVAC app.
MrCool stands behind the quality and workmanship of this system by being the only manufacturer to offer a limited lifetime compressor warranty. This DIY 4th Gen 18k BTU Ductless Mini Split Heat Pump Complete System 208-230V/60Hz is perfect for homeowners who want to save money on installation costs and have the satisfaction of installing the system themselves.
Helps Cut Down Energy Costs
MrCool DIY 4th Gen E Star Features

Easy DIY® Installation
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
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


MRCOOL DIY 4th Gen E Star 18k BTU Ductless Mini Split Heat Pump Features
- Up to 22.7 SEER2
- Gold Fin® condenser: corrosion-resistant coastal living - don't worry, our condenser is built to resist long term corrosion
- Variable-speed DC inverter compressor technology cuts operating costs
- R-410A environmentally friendly refrigerant
- Standard 7-year compressor/5-year parts warranty; register for limited lifetime compressor warranty
DIY 4th Gen E Star 18k BTU Ductless Mini Split Heat Pump Specifications
Tech Specs
Model |
DIY-18-HP-WM-230C25 |
SEER |
22 |
SEER2 |
22.7 |
EER |
12.5 |
EER2 |
12.6 |
COP 47 |
3.74 |
HSPF |
hspf4/hspf5 : 11.5/9 |
HSPF2 |
hspf2-4/hspf2-5 : 9.8/7.2 |
CFM |
465.29/361.76/304.12 |
Cooling Capacity |
18000 BTU |
Heating Capacity |
18000 BTU |
Voltage |
208-230 V |
INSTALL KIT (LINE SET) SPECS
Length |
25ft |
Max Lineset Length |
75ft |
Liquid Line Size |
1/4 in |
Suction Line Size |
1/2 in |
RESTRICTIONS AND WARNINGS
Restricted States |
GU;PR;VI |
Proposition 65 Warning |
Yes |
Has Batteries |
Yes |
Contains Electronics |
Yes |
Contains Chemicals |
Yes |
Contains Aerosol |
Yes |
INDOOR UNIT (AIR HANDLER) SPECS
Model |
DIY-18-HP-WMAH-230C25 |
Air Flow Direction |
4-W |
Oscillation |
Yes |
Min Ambient Cool |
-13F - 122F |
Min Ambient Heat |
-13F - 75F |
Auxiliary Heater Included |
No |
Auxiliary Heater Available |
No |
Fan Only Option |
Yes |
Quiet Mode |
Yes |
Auto Cool |
Yes |
WIFI Compatibility |
Yes |
APP Compatibility |
Yes |
Works With IOS |
Yes |
Works With ANDROID |
Yes |
Remote Control Included |
Yes |
UL Listed |
Yes |
Energy Star Certified |
Yes |
AHRI Certified |
Yes |
Air Handler Depth |
8.90 in |
Air Handler Height |
13.19 in |
Air Handler Width |
42.52 in |
Air Handler Weight |
34.61 lbs |
OUTDOOR UNIT (CONDENSER) SPECS
Model |
DIY-18-HP-C-230C |
Inverter |
Yes |
Phase |
1 |
Cycle |
60 Hz |
Max Fuse Breaker |
30 A |
Min Circuit Ampacity |
18 A |
Rated Load |
0.25 A |
Max Coverage Area |
Up to 750 sqft |
Zone Capacity |
1 |
Refrigerant Type |
R-410A |
Refrigerant Volume |
56.44 oz |
Decibel Rating |
44.5/37/31 |
Decibel Rating Low |
31 Dba |
Decibel Rating High |
44.5 Dba |
Compressor Motor Type |
Rotary |
Condenser Fan Motor Rpm |
810/720 |
Blower Motor Rpm |
1120/950/700 |
Condenser Depth |
13.46 in |
Condenser Height |
26.50 in |
Condenser Width |
35.04 in |
Condenser Weight |
94.36 lbs |
DIY 4th Gen E Star 18k BTU Ductless Mini Split Heat Pump Videos
Why DIY HVAC
DIYPro Cable
Built for Everywhere
4th Gen DIY vs 3rd Gen DIY
Downloads