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Get $100 Cash Back on Your Qualifying Purchase
- Spend over $1000 on heating and air equipment.
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- 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.
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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.
Customize Your Comfort
Choose Your System Size
Select the outdoor condenser that matches your home’s square footage and zone needs. The all-new MrCool DIY Multi-zone goes up to 6 zones to meet your home’s needs.
Easy DIY® installation
Leakage Detection
DIY Pro® Cable
Match Each Zone to Your Ideal Air Handler
Choose a wall-mounted, ceiling-mounted, or the all-new DIY Hybrid Central Ducted air handler to create a multi-zone system built around your home and your needs.
Smartphone App
Low Ambient Cooling*
Easy Quick Connect
Explore the lineup.
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.

Locking the weather conditions outside of your space should be an effortless task for your home’s heating and cooling system. Once you have the MrCool DIY Multi Zone Mini Split 54k BTU 2 Zone Ductless AC & Heat Pump - 5th Generation - R454B, enjoying top-tier climate control won’t be a question any longer. Covered by AHRI and Energy Star certifications, on top of ETL and UL listings, this MrCool Mini Split undergoes intensive third-party tests to validate the integrity of every operational, efficiency, and safety claim. For your 2000 to 2400 square foot space, let this 54k BTU MrCool AC & Heat Pump make the most of it without delay.
Whether it’s time to get your new system set up and running, the MrCool DIY Multi Zone Mini Split 54k BTU 2 Zone Ductless AC & Heat Pump - 5th Generation - R454B takes away the annoyance of coordinating schedules with a licensed professional. The included gold fin condensers fight off corrosion, making this MrCool Heat Pump the perfect fit for coastal climates and areas with industrial business. Working with accessories like the DIYPro armored cable and the quick connect DIY line sets so that connecting the indoor and outdoor system components without training, this MrCool AC & Heat Pump puts the power of installation in your hands without compromising on the results you’ve been hoping for.
Putting the flexibility you crave right in the palm of your hands, the MrCool DIY Multi Zone Mini Split 54k BTU 2 Zone Ductless AC & Heat Pump - 5th Generation - R454B makes sure you and your loved ones are always enjoying peak comfort. Each air handler can take advantage of the Follow Me function separately from the other, making use of sensors in the remote control to monitor the conditions at its location and adjust the airflow as necessary to create your preferred conditions. With the remote itself and the smartphone app giving you additional in the moment options to change up your settings, this MrCool Mini Split guarantees that you’ll never have to suffer through inadequate heating and cooling results in your home again.
Supporting all this powerful hardware with a warranty that encompasses 5 years of coverage on parts and 7 years on the compressor, as well as the ability to extend that coverage to a limited lifetime on the compressor once enrolled in the MrCool Care Program, there’s no reason to put off your upgrade any longer. Grab this 5th Generation 54k BTU MrCool DIY Multi Zone Ductless Mini Split AC & Heat Pump system with two air handlers and line sets full of energy-efficient R454B refrigerant today.
| Model | DIYM255HPW04D |
|---|---|
| AHRI Number | 216032598 |
| Bundle Avg Coverage Area | 2,000 - 2,400 Sq Ft |
| Bundle Cooling Capacity | 4.5 Ton |
| Bundle Cooling Efficiency (SEER2) | 22 |
| Heat Pump Efficiency (HSPF2) | 10.6 |
| Series | DIY |
| Region Compatibility | Nationwide |
| California Residents | see Prop 65 WARNING |
DIY-MULTI6-55HP230D-O Specifications:
| Model | DIY-MULTI6-55HP230D-O |
|---|---|
| UPC | 840255587488 |
| AHRI Number | 216032598 |
| Product Height (in) | 52.5 |
| Avg Coverage Area | 2,000 - 2,400 Sq Ft |
| Product Length (in) | 16.3 |
| Compressor | Inverter |
| Product Width (in) | 37.5 |
| Cooling Capacity | 4 Ton |
| Electrical Phase | 1-Phase |
| Heat Pump Efficiency (HSPF2) | 10.6 |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 1/4 inch |
| Max Overcurrent Protection | 40 amps |
| Weight (lbs) | 245.800000 |
| Primary Heating Capacity | 50,001 - 55,000 BTU |
| Refrigerant | R-454b |
| Cooling Efficiency (SEER2) | 22 |
| 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-18-HP-WMAH-230D25-O Specifications:
| Model | DIY-18-HP-WMAH-230D25-O |
|---|---|
| UPC | 840255587044 |
| Product Height (in) | 13.19 |
| Configuration | Wall Mounted |
| Product Length (in) | 8.9 |
| Air Flow Direction | Horizontal |
| Product Width (in) | 42.52 |
| Blower Motor | Variable Speed |
| Cooling Capacity | 1.5 Ton |
| Electrical Phase | 1-Phase |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 1/4 inch |
| Max Overcurrent Protection | 20 amps |
| Weight (lbs) | 54.010000 |
| Refrigerant | R-454b |
| Series | DIY |
| Suction Line Size | 1/2 inch |
| System Application Type | Ductless Split Systems |
| Voltage | 240 |
| Warranty | 5 Year Parts, 7 Year Compressor |
DIYCASSETTE18HP-230D25-O Specifications:
| Model | DIYCASSETTE18HP-230D25-O |
|---|---|
| UPC | 840255587525 |
| 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 | 1.5 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 | 1/2 inch |
| System Application Type | Ductless Split Systems |
| Voltage | 240 |
| Warranty | Lifetime, 5 Year Parts, 7 Year Compressor |
DIY-36-HP-WMAH-230D25-O Specifications:
| Model | DIY-36-HP-WMAH-230D25-O |
|---|---|
| UPC | 840255587068 |
| Product Height (in) | 14.25 |
| Configuration | Wall Mounted |
| Product Length (in) | 11.1 |
| Air Flow Direction | Horizontal |
| Product Width (in) | 49.57 |
| Blower Motor | Variable Speed |
| Cooling Capacity | 3 Ton |
| Electrical Phase | 1-Phase |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 3/8 inch |
| Max Overcurrent Protection | 35 amps |
| Weight (lbs) | 70.990000 |
| Refrigerant | R-454b |
| Series | DIY |
| Suction Line Size | 5/8 inch |
| System Application Type | Ductless Split Systems |
| Voltage | 240 |
| Warranty | 5 Year Parts, 7 Year Compressor |
DIY-36-HP-MUAH-230D25-O Specifications:
| Model | DIY-36-HP-MUAH-230D25-O |
|---|---|
| UPC | 840255588416 |
| Product Height (in) | 49 |
| Configuration | Floor Mounted |
| Product Length (in) | 21 |
| Air Flow Direction | Downflow, Horizontal, Upflow |
| Product Width (in) | 21 |
| Blower Motor | Multi Speed |
| Cooling Capacity | 3 Ton |
| Electrical Phase | 1-Phase |
| Heat Strip Compatibility | Up to 20 kW |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 3/8 inch |
| Max Overcurrent Protection | 15 amps |
| Weight (lbs) | 128.300000 |
| Refrigerant | R-454b |
| Series | DIY |
| Suction Line Size | 5/8 inch |
| System Application Type | Ductless Split Systems |
| Voltage | 240 |
| Warranty | Lifetime, 5 Year Parts |
DIY16-1412-O Specifications:
| Model | DIY16-1412-O |
|---|---|
| UPC | 840255587075 |
| Product Length (in) | 192 |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 1/4 inch |
| Weight (lbs) | 13.000000 |
| Suction Line Size | 1/2 inch |
| System Application Type | Ductless Split Systems |
| Warranty | None |
DIY25-1412-O Specifications:
| Model | DIY25-1412-O |
|---|---|
| UPC | 840255587099 |
| Product Length (in) | 300 |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 1/4 inch |
| Weight (lbs) | 17.000000 |
| Suction Line Size | 1/2 inch |
| System Application Type | Ductless Split Systems |
| Warranty | None |
DIY35-1412C-O Specifications:
| Model | DIY35-1412C-O |
|---|---|
| UPC | 840255587136 |
| Product Length (in) | 420 |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 1/4 inch |
| Weight (lbs) | 23.000000 |
| Suction Line Size | 1/2 inch |
| System Application Type | Ductless Split Systems |
| Warranty | None |
DIY50-1412C-O Specifications:
| Model | DIY50-1412C-O |
|---|---|
| UPC | 840255587150 |
| Product Length (in) | 600 |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 1/4 inch |
| Weight (lbs) | 33.000000 |
| Suction Line Size | 1/2 inch |
| System Application Type | Ductless Split Systems |
| Warranty | None |
DIY16-3858-O Specifications:
| Model | DIY16-3858-O |
|---|---|
| UPC | 840255587082 |
| Product Length (in) | 192 |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 3/8 inch |
| Weight (lbs) | 19.000000 |
| Suction Line Size | 5/8 inch |
| System Application Type | Ductless Split Systems |
| Warranty | None |
DIY25-3858-O Specifications:
| Model | DIY25-3858-O |
|---|---|
| UPC | 840255587112 |
| Product Length (in) | 300 |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 3/8 inch |
| Weight (lbs) | 19.000000 |
| Suction Line Size | 5/8 inch |
| System Application Type | Ductless Split Systems |
| Warranty | None |
DIY35-3858C-O Specifications:
| Model | DIY35-3858C-O |
|---|---|
| UPC | 840255587143 |
| Product Length (in) | 420 |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 3/8 inch |
| Weight (lbs) | 23.000000 |
| Suction Line Size | 5/8 inch |
| System Application Type | Ductless Split Systems |
| Warranty | None |
DIY50-3858C-O Specifications:
| Model | DIY50-3858C-O |
|---|---|
| UPC | 840255587167 |
| Product Length (in) | 600 |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 3/8 inch |
| Weight (lbs) | 37.000000 |
| Suction Line Size | 5/8 inch |
| System Application Type | Ductless Split Systems |
| Warranty | None |




