MRCOOL DIY Select 18K BTU Single Zone Mini Split Heat Pump System
Affordable DIY Comfort. Easy Installation. Reliable Heating & Cooling.
The MRCOOL DIY Select single zone mini split heat pump is built for homeowners who want reliable heating and cooling without the high cost of traditional HVAC installation. With an included 11.5 foot pre-charged QuickConnect line set, smart comfort control, inverter technology, and R-454B refrigerant, DIY Select delivers practical year-round comfort at a more affordable price.
Heat and cool bedrooms, garages, home offices, workshops, additions, sunrooms, rental spaces, and other single-room areas with an efficient ductless system designed for true do-it-yourself installation.
System Overview
MRCOOL DIY Select 18K BTU Single Zone Mini Split Heat Pump System
Cooling Capacity: 17,000 BTU
Heating Capacity: 18,000 BTU
Recommended Coverage: Up to 800 Sq Ft
Efficiency: 17.3 SEER2 / 8.5 HSPF2-4
208/230V Single Phase Power
R-454B Refrigerant
Variable Speed Inverter Compressor
11.5 Foot Pre-Charged QuickConnect Line Set Included
Smart HVAC Controller Included
WiFi Smartphone App Control
Amazon Alexa & Google Assistant Compatible
Wall Mounted Indoor Air Handler
Heat Pump Heating & Cooling Operation
Why Choose DIY Select?
DIY Select gives homeowners the MRCOOL DIY installation advantage in a more affordable single zone system. It is ideal for buyers who want dependable heating and cooling, smart comfort control, and lower total project cost without paying for a traditional professional mini split installation.
Affordable MRCOOL Comfort
Designed to make ductless heating and cooling more accessible.
True DIY Installation
Pre-charged QuickConnect fittings help eliminate vacuum pumps, gauges, and refrigerant handling.
Smart Everyday Control
Use the MRCOOL Comfort App to adjust temperature, change modes, and create schedules.
Reliable Year-Round Comfort
Inverter technology helps provide efficient heating and cooling for everyday living spaces.
Everything You Need — Included
- Indoor wall-mounted air handler
- Outdoor condenser
- 11.5 foot pre-charged QuickConnect line set
- Remote control
- Smart HVAC Controller
- Installation accessories
- Factory pre-charged R-454B refrigerant system
Need a longer line set? Optional 16', 25', 35', and 50' line sets are available separately.
Easy DIY Install — You Can Do It Yourself
Unlike traditional mini split systems that require vacuum pumps, gauges, and refrigerant handling, the MRCOOL DIY Select is designed to make installation more approachable for homeowners.
Step 1: Mount
Install the indoor air handler and outdoor condenser.
Step 2: Connect
Attach the included 11.5 foot pre-charged QuickConnect line set.
Step 3: Power On
Enjoy efficient heating and cooling without the typical cost of professional mini split installation.
Smart Comfort Control
WiFi Smartphone Control
Control your system from almost anywhere using the MRCOOL Comfort App.
Alexa & Google Assistant Compatible
Use compatible voice assistants for convenient comfort control.
Create Schedules
Set comfort routines that match your day.
Change Modes & Settings
Adjust temperature, operating mode, and system settings from the app.
Choose the Right Size
| System Size |
Recommended Coverage |
Voltage |
| 9K BTU |
Up to 400 sq ft |
115V |
| 12K BTU |
Up to 550 sq ft |
115V |
| 18K BTU |
Up to 800 sq ft |
208/230V |
| 24K BTU |
Up to 1,050 sq ft |
208/230V |
Coverage estimates depend on insulation, ceiling height, climate, windows, sun exposure, and room layout.
Important Information
- This listing includes one 11.5 foot pre-charged QuickConnect line set.
- Optional longer line sets are available separately if your installation requires additional length.
- Please verify voltage compatibility before ordering.
- Professional electrical work may still be required depending on local code requirements.
- System sizing should be selected carefully before purchase.
- Ships freight due to system size and weight.
Questions About Sizing or Compatibility?
Send us a message before purchase — we are happy to help you select the right MRCOOL DIY Select system for your space.