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Get $100 Cash Back on Your Qualifying Purchase
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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.

Ensuring the comfort of you and your loved ones inside your home is the entire purpose of your heating and cooling system. Rather than tolerating subpar results, bring in the MrCool DIY Multi Zone Mini Split 33k BTU 4 Zone Ductless AC & Heat Pump - 5th Generation - R454B to give your space the results you seek. Earning AHRI and Energy Star certifications on top of ETL and UL listings, this MrCool Mini Split has passed a variety of impartial tests that verify the accuracy of every functional, efficiency, and safety claim. When you’re ready for your 1250 and 1500 square foot space to stay comfortable in any weather, the 33k BTU MrCool AC & Heat Pump is willing to take on the task.
Tired of coordinating schedules and high installation costs? With the MrCool DIY Multi Zone Mini Split 33k BTU 4 Zone Ductless AC & Heat Pump - 5th Generation - R454B, do-it-yourself really means no need for professional setup. Giving you streamlined setup processes with DIY line sets and the DIYPro armored cable, this MrCool AC & Heat Pump eliminates the kinds of tasks that only HVAC technicians can safely do like vacuuming. With gold fin condensers that provide an impressive longevity to the internal hardware, this MrCool Heat Pump can even tackle climate control in highly corrosive environments like along the coast or near industrial plants that tend to erode outdoor hardware more quickly than normal.
Catering each and every zone to the unique settings you choose for that space, the MrCool DIY Multi Zone Mini Split 33k BTU 4 Zone Ductless AC & Heat Pump - 5th Generation - R454B goes above and beyond to maximize your results from every angle. Equipped with the Follow Me function that can automatically change the airflow, you can simply keep the remote control near to you and let the system handle the hard part. With the remote control and its built-in sensors working alongside the smartphone app that gives you the means to adjust your settings from anywhere in the world, this MrCool Mini Split is the perfect fit to give you the results you’ve been wanting.
Even supporting the system with a standard warranty that covers 5 years on parts and 7 years on the compressor with the ability to elongate the coverage on the compressor to a limited lifetime once you enroll in the MrCool Care Program, why would you choose to tolerate inadequate results any longer? Acquire this 5th Generation 33k BTU MrCool DIY Multi Zone Ductless Mini Split AC & Heat Pump bundle with four indoor air handlers and line sets today.
| Model | DIYM436HPW05D |
|---|---|
| AHRI Number | 216032592 |
| Bundle Avg Coverage Area | 1,250 - 1,500 Sq Ft |
| Bundle Cooling Capacity | 2.5 Ton |
| Bundle Cooling Efficiency (SEER2) | 23 |
| Heat Pump Efficiency (HSPF2) | 9.9 |
| Series | DIY |
| Region Compatibility | Nationwide |
| California Residents | see Prop 65 WARNING |
DIY-MULTI5-36HP230D-O Specifications:
| Model | DIY-MULTI5-36HP230D-O |
|---|---|
| UPC | 840255587464 |
| AHRI Number | 216032592 |
| Product Height (in) | 31.2 |
| Avg Coverage Area | 1,500 - 1,800 Sq Ft |
| Product Length (in) | 16.1 |
| Compressor | Inverter |
| Product Width (in) | 37.2 |
| Cooling Capacity | 3 Ton |
| Electrical Phase | 1-Phase |
| Heat Pump Efficiency (HSPF2) | 9.9 |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 1/4 inch |
| Max Overcurrent Protection | 30 amps |
| Weight (lbs) | 169.200000 |
| Primary Heating Capacity | 35,001 - 40,000 BTU |
| Refrigerant | R-454b |
| Cooling Efficiency (SEER2) | 23 |
| 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 |
DIYCASSETTE06HP-230D25-O Specifications:
| Model | DIYCASSETTE06HP-230D25-O |
|---|---|
| UPC | 840255587495 |
| 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 |
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 |
DIYCASSETTE06HP-230D25-O Specifications:
| Model | DIYCASSETTE06HP-230D25-O |
|---|---|
| UPC | 840255587495 |
| 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 |
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 |
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 |
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 |
DIY-12-HP-WMAH-230D25-O Specifications:
| Model | DIY-12-HP-WMAH-230D25-O |
|---|---|
| UPC | 840255587037 |
| 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 | 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 |
DIYCASSETTE12HP-230D25-O Specifications:
| Model | DIYCASSETTE12HP-230D25-O |
|---|---|
| UPC | 840255587518 |
| 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 | 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 |
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 |




