We use cookies to ensure fast, reliable, and secure operations, and to give you the best possible experience when using our website. We use both session-based cookies and persistent cookies. We also allow the use of third-party cookies by certain authorized third parties with whom we execute marketing campaigns. For more information, please refer to our Privacy And Cookie Policy.


Get $100 Cash Back on Your Qualifying Purchase
- Spend over $1000 on heating and air equipment.
- Share this video publicly on your existing Facebook news feed. https://youtu.be/O4nmrlbF0aA
- Email a screenshot of the video on your facebook profile to [email protected] along with your order number.
- Get a check mailed to you for $100.
Limited Time Offer. Act Now!
Rebate only valid for qualifying purchases made after September 19, 2022 until further notice. Rebate claim limited to one per customer. Purchase must be made prior to sharing video. Please allow 1-2 weeks for processing. May not be used in conjunction with any other offer or discount. Video privacy setting must be public.
Contact an expert now.
The next generation of comfort is here.
With a new MrCool DIY 5th Gen Multi-Zone Mini-Split. Our patented MRCOOL® Series heat pump is the only ductless mini-split system on the market specifically designed for amateur installation.
Explore the lineup.
Certified Efficiency
Live on the coast? Don't worry, our condenser features Gold Fin condensers built to resist long term corrosion.
Easy DIY® installation
Leakage Detection
Easy DIY® installation

Customize Your Comfort
Choose a wall-mounted or ceiling-mounted air handler to create a multi-zone system built around your home and your needs.
Smartphone App
Low Ambient Cooling*
Easy Quick Connect
SmartPhone App
Control your MRCOOL® DIY® anywhere with your Apple or Android smart device and an internet connection.
® DIY® Anywhere and manage
App Available in Apple & Android
Follow Me Function
Keep the included remote close by, and MRCOOL DIY® will track the air temperature around you to ensure maximum comfort.
Tracks temperature around you for personalized comfort.
Auto Restart
Multi-Zone Solutions
Individual Rooms?
Individual Results.
Each zone can choose settings that won’t influence the others
Every air handler can use the Follow Me feature for maximum comfort
The MrCool DIY has 2, 3, 4, 5 and 6 zone options, the best warranties in the business, even better efficiency ratings, and a new Armored Pro Cable.
DIY made easy.

No refrigerant? No problem. With our patented, pre-charged quick connect line sets you'll be able to install your MRCOOL® DIY® without needing specialized training or expensive tools.
The ends use proprietary Quick Connect® Threaded fittings that seal tight without needing brazing or soldering.
Made to be secure, lead-free, and DIY-safe - even for first-timers
U.S. patented technology that sets MRCOOL apart in the ductless market.

Future-proof your investment with the included DIYPro® cable, eliminating the need for electrical conduit.
Armored metal casing protects your electrical connection from damage, pests, and the elements.
Especially useful in garages, basements, sheds, or exterior walls where exposure is a concern.
Protect your Purchase.
Warranty Programs
Each unit comes backed with a standard 5-year warranty on replacement parts and a 7-year warranty on the compressor. For even greater protection, upgrade to the MrCool Care Kit Program and enjoy an extended limited lifetime replacement warranty—because long-term comfort shouldn’t come with surprises.

Getting a new HVAC system for your home or any other space from home additions to office spaces doesn’t have to be a costly and complicated process. Once you choose the MrCool DIY Multi Zone Mini Split 15k BTU 2 Zone Ductless AC & Heat Pump - 5th Generation - R454B, you can enjoy pleasant temperatures all year-round. From UL and ETL listing to AHRI and Energy Star certifications, this MrCool Mini Split has passed intensive third-party evaluations to verify the legitimacy of every operational, efficiency, and safety claim. Regulating the temperature in spaces between 500 and 600 square feet, this 15k BTU MrCool AC & Heat Pump is ready to make a positive impact on the comfort levels you enjoy within your space.
Giving you the ability to install your heating and cooling system with your own two hands, the MrCool DIY Multi Zone Mini Split 15k BTU 2 Zone Ductless AC & Heat Pump - 5th Generation - R454B saves you time and money on what is normally a tedious process. Built-in corrosion resistance on the gold fin condensers ensure this MrCool Heat Pump can handle coastal and other corrosive environments with ease, fending off rust from salt water in the air as well as any other harmful chemicals. Between the DIYPro armored cable that connects the electronic components of your system to the quick connect DIY line sets that are precharged with R454b refrigerant, this MrCool AC & Heat Pump is a great solution for a wide range of situations.
Putting the means to change up performance in your pocket, the MrCool DIY Multi Zone Mini Split 15k BTU 2 Zone Ductless AC & Heat Pump - 5th Generation - R454B makes enjoying your ideal conditions as simple as possible. The two separate air handlers will each be able to use the Follow Me function with their respective remote controls, using sensors in the controller to read in the conditions at its location and automatically adjusting to ensure that space feels your exact climate preferences. With the inclusion of a smartphone app that makes changing your settings effortless, plus a louver position memory that returns to the previously chosen position when powered on, this MrCool Mini Split is exactly what you need for your space.
When all these powerful features and benefits are covered by a default warranty of 5 years on parts and 7 years on the compressor, with the option to enroll in the MrCool Care Kit Program, what else could you need from your upgrade? Acquire this 5th Generation 15k BTU MrCool DIY Multi Zone Ductless Mini Split AC & Heat Pump with two indoor air handlers and their line sets utilizing R454B refrigerant today.
| Model | DIYM218HPW01D |
|---|---|
| AHRI Number | 216032588 |
| Bundle Avg Coverage Area | 500 - 600 Sq Ft |
| Bundle Cooling Capacity | 1 Ton |
| Bundle Cooling Efficiency (SEER2) | 23.9 |
| Heat Pump Efficiency (HSPF2) | 10 |
| Series | DIY |
| Region Compatibility | Nationwide |
| California Residents | see Prop 65 WARNING |
DIY-MULTI3-18HP230D-O Specifications:
| Model | DIY-MULTI3-18HP230D-O |
|---|---|
| UPC | 840255587617 |
| AHRI Number | 216032588 |
| Product Height (in) | 26.5 |
| Avg Coverage Area | Less than 500 Sq Ft |
| Product Length (in) | 13.5 |
| Compressor | Inverter |
| Product Width (in) | 35 |
| Cooling Capacity | 1.5 Ton |
| Electrical Phase | 1-Phase |
| Heat Pump Efficiency (HSPF2) | 10 |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 1/4 inch |
| Max Overcurrent Protection | 20 amps |
| Weight (lbs) | 101.600000 |
| Primary Heating Capacity | 15,001 - 20,000 BTU |
| Refrigerant | R-454b |
| Cooling Efficiency (SEER2) | 23.9 |
| Series | DIY |
| Suction Line Size | 3/8 inch |
| System Application Type | Ductless Split Systems |
| Voltage | 240 |
| Warranty | 5 Year Parts, 7 Year Compressor |
| Region Compatibility | Nationwide |
DIY-06-HP-WMAH-230D25-O Specifications:
| Model | DIY-06-HP-WMAH-230D25-O |
|---|---|
| UPC | 840255587013 |
| Product Height (in) | 11.7 |
| Configuration | Wall Mounted |
| Product Length (in) | 7.4 |
| Air Flow Direction | Horizontal |
| Product Width (in) | 31.6 |
| Blower Motor | Variable Speed |
| Cooling Capacity | Less than 1 Ton |
| Electrical Phase | 1-Phase |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 1/4 inch |
| Weight (lbs) | 24.500000 |
| Refrigerant | R-454b |
| Series | DIY |
| Special Features | Alexa, Google Assistant, WiFi Capable |
| Suction Line Size | 3/8 inch |
| System Application Type | Ductless Split Systems |
| Voltage | 240 |
| Warranty | Lifetime, 5 Year Parts, 7 Year Compressor |
DIY-09-HP-WMAH-230D25-O Specifications:
| Model | DIY-09-HP-WMAH-230D25-O |
|---|---|
| UPC | 840255587020 |
| Product Height (in) | 11.7 |
| Configuration | Wall Mounted |
| Product Length (in) | 7.4 |
| Air Flow Direction | Horizontal |
| Product Width (in) | 31.6 |
| Blower Motor | Variable Speed |
| Cooling Capacity | Less than 1 Ton |
| Electrical Phase | 1-Phase |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 1/4 inch |
| Weight (lbs) | 24.500000 |
| Refrigerant | R-454b |
| Series | DIY |
| Special Features | Alexa, Google Assistant, WiFi Capable |
| Suction Line Size | 3/8 inch |
| System Application Type | Ductless Split Systems |
| Voltage | 240 |
| Warranty | Lifetime, 5 Year Parts, 7 Year Compressor |
DIYCASSETTE09HP-230D25-O Specifications:
| Model | DIYCASSETTE09HP-230D25-O |
|---|---|
| UPC | 840255587501 |
| Product Height (in) | 8.9 |
| Configuration | Ceiling Mounted |
| Product Length (in) | 13.2 |
| Air Flow Direction | Downflow |
| Product Width (in) | 50.3 |
| Blower Motor | Variable Speed |
| Cooling Capacity | Less than 1 Ton |
| Electrical Phase | 1-Phase |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 1/4 inch |
| Weight (lbs) | 45.000000 |
| Refrigerant | R-454b |
| Series | DIY |
| Special Features | Alexa, Google Assistant, WiFi Capable |
| Suction Line Size | 3/8 inch |
| System Application Type | Ductless Split Systems |
| Voltage | 240 |
| Warranty | Lifetime, 5 Year Parts, 7 Year Compressor |
DIY16-1438-O Specifications:
| Model | DIY16-1438-O |
|---|---|
| UPC | 840255589154 |
| Product Length (in) | 192 |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 1/4 inch |
| Weight (lbs) | 7.900000 |
| Suction Line Size | 3/8 inch |
| System Application Type | Ductless Split Systems |
| Warranty | None |
DIY25-1438-O Specifications:
| Model | DIY25-1438-O |
|---|---|
| UPC | 840255589161 |
| Product Length (in) | 300 |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 1/4 inch |
| Weight (lbs) | 10.400000 |
| Suction Line Size | 3/8 inch |
| System Application Type | Ductless Split Systems |
| Warranty | None |
DIY35-1438C-O Specifications:
| Model | DIY35-1438C-O |
|---|---|
| UPC | 840255589185 |
| Product Length (in) | 420 |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 1/4 inch |
| Weight (lbs) | 17.600000 |
| Suction Line Size | 3/8 inch |
| System Application Type | Ductless Split Systems |
| Warranty | None |
DIY50-1438C-O Specifications:
| Model | DIY50-1438C-O |
|---|---|
| UPC | 840255589192 |
| Product Height (in) | 36.5 |
| Product Width (in) | 35.5 |
| Product Length (in) | 600 |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 1/4 inch |
| Weight (lbs) | 24.000000 |
| Suction Line Size | 3/8 inch |
| System Application Type | Ductless Split Systems |
| Warranty | None |
DIY16-1438-O Specifications:
| Model | DIY16-1438-O |
|---|---|
| UPC | 840255589154 |
| Product Length (in) | 192 |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 1/4 inch |
| Weight (lbs) | 7.900000 |
| Suction Line Size | 3/8 inch |
| System Application Type | Ductless Split Systems |
| Warranty | None |
DIY25-1438-O Specifications:
| Model | DIY25-1438-O |
|---|---|
| UPC | 840255589161 |
| Product Length (in) | 300 |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 1/4 inch |
| Weight (lbs) | 10.400000 |
| Suction Line Size | 3/8 inch |
| System Application Type | Ductless Split Systems |
| Warranty | None |
DIY35-1438C-O Specifications:
| Model | DIY35-1438C-O |
|---|---|
| UPC | 840255589185 |
| Product Length (in) | 420 |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 1/4 inch |
| Weight (lbs) | 17.600000 |
| Suction Line Size | 3/8 inch |
| System Application Type | Ductless Split Systems |
| Warranty | None |
DIY50-1438C-O Specifications:
| Model | DIY50-1438C-O |
|---|---|
| UPC | 840255589192 |
| Product Height (in) | 36.5 |
| Product Width (in) | 35.5 |
| Product Length (in) | 600 |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 1/4 inch |
| Weight (lbs) | 24.000000 |
| Suction Line Size | 3/8 inch |
| System Application Type | Ductless Split Systems |
| Warranty | None |




