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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.

Keeping your home comfortable as the weather changes throughout the year doesn’t have to be a difficult task. Once you secure the MrCool DIY Multi Zone Mini Split 45k BTU 2 Zone Ductless AC & Heat Pump - 5th Generation - R454B for your home, climate control will be well within your grasp. Supported by AHRI and Energy Star certifications, as well as ETL and UL listings, this MrCool Mini Split undergoes intensive third-party testing to verify the integrity of every performance, efficiency, and safety claim. Enjoy bliss in each inch of your 1750 to 2100 square foot space with the 45k BTU MrCool AC & Heat Pump.
Nothing makes you feel more powerful than tackling a task with your own two hands. Luckily, the MrCool DIY Multi Zone Mini Split 45k BTU 2 Zone Ductless AC & Heat Pump - 5th Generation - R454B does just that when it comes to the installation process. The gold fin condensers keep the internal hardware safe from corrosion, letting this MrCool Heat Pump effortlessly maintain comfort in corrosive environments like coastal regions. Giving you the means to hook up the indoor and outdoor units via the DIYPro armored cable and the quick connect DIY line sets, this MrCool AC & Heat Pump takes away the unnecessary complication to set you up for success.
Giving you customizable climate control options that accommodate your preferences, the MrCool DIY Multi Zone Mini Split 45k BTU 2 Zone Ductless AC & Heat Pump - 5th Generation - R454B is well-equipped to fight off the outside temperatures. Each air handler can enact the Follow Me function fully separate from the other, checking the temperature in the space with built-in sensors then relaying that information back to the system so it can automatically adjust the output to optimize comfort. With Follow Me and the smartphone app that makes it easy to change up your settings as they shift throughout the day or year, this MrCool Mini Split ensures you can stay cool, calm, and collected during the hottest summer heat waves.
If you could have your cake and eat it too why would you hesitate on making a change for the better? Even backed by a warranty that includes 5 years of coverage on the parts and 7 years on the compressor, on top of the ability to elongate that coverage to a limited lifetime on the compressor when enrolled in the MrCool Care Program, there’s no reason to delay. Grab this 5th Generation 45k BTU MrCool DIY Multi Zone Ductless Mini Split AC & Heat Pump system with two air handlers and their line sets full of energy-efficient R454B refrigerant today.
| Model | DIYM248HPW02D |
|---|---|
| AHRI Number | 216032595 |
| Bundle Avg Coverage Area | 1,750 - 2,100 Sq Ft |
| Bundle Cooling Capacity | 3.5 Ton |
| Bundle Cooling Efficiency (SEER2) | 21.8 |
| Heat Pump Efficiency (HSPF2) | 10 |
| Series | DIY |
| Region Compatibility | Nationwide |
| California Residents | see Prop 65 WARNING |
DIY-MULTI6-48HP230D-O Specifications:
| Model | DIY-MULTI6-48HP230D-O |
|---|---|
| UPC | 840255587471 |
| AHRI Number | 216032595 |
| 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 |
| Line Set Connection Type | Quick Connect |
| Liquid Line Size | 1/4 inch |
| Max Overcurrent Protection | 40 amps |
| Weight (lbs) | 223.800000 |
| Primary Heating Capacity | 45,001 - 50,000 BTU |
| Refrigerant | R-454b |
| Cooling Efficiency (SEER2) | 21.8 |
| 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-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-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 |
DIY16-1438-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 |
DIY16-3858-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 |




