MRCOOL® DIY 5th Gen 55,000 BTU 22 SEER2 5-Zone Ceiling Cassette Ductless Mini-Split Air Conditioner and Heat Pump - Build Your Own MRCOOL® 5 Zone Ceiling Cassette Mini Split System R454B

Build Your Own MRCOOL® DIY 5th Gen 55,000 BTU 22 SEER2 5-Zone Ceiling Cassette Ductless Mini-Split Air Conditioner and Heat Pump system today! Pick the ceiling cassette air handler sizes that best fits your space above and build your perfect MRCOOL® system.

The MRCOOL® DIY 5th Gen Multi-Zone 5-Zone 55,000 BTU 22 SEER2 Ceiling Cassette Ductless Mini-Split Air Conditioner and Heat Pump is the perfect solution for year-round comfort. Designed for easy do-it-yourself installation, this powerful system delivers reliable heating and cooling across five separate zones, each with its own temperature control.

With an energy efficiency rating of 22 SEER2, the MRCOOL® DIY 5th Gen Multi-Zone 55,000 BTU Ceiling Cassette Ductless Mini-Split helps lower utility costs while maintaining comfort. Pre-charged R-454B Quick-Connect lines make setup fast and eco-friendly—no special tools required.

Smart Wi-Fi integration allows you to control the MRCOOL® DIY 5th Gen Multi-Zone Mini-Split System from anywhere, with support for Alexa and Google Assistant. Backed by a 7-year compressor (Extended Limited Lifetime when registered) and 5-year parts warranty, this system combines convenience, efficiency, and peace of mind.

Features:

• Smartphone App: Control your MRCOOL® DIY® anywhere with your Apple or Android smart device and an internet connection.
• DIYPRO® Armored Cable: Future-proof your investment with the included DIYPro® cable, eliminating the need for electrical conduit.
  
• DC inverter: DC inverters adjust compressor speed to meet cooling/heating demands, running at lower, efficient speeds for longer periods instead of frequent, energy-consuming on/off cycles. This can lead to significant savings on electricity bills.
• Louver Position Memory: The air handler's horizontal louver will automatically reset to the same position that was set the last time the unit was powered on.
• Quick Connect® - Just connect It’s that simple: The patented MRCOOL® DIY® Quick Connect® Line Set (sold separately) is 100% accurately pre-charged with R-454B refrigerant. Installation is quick and easy with no vacuum required and no specialized tools needed, just connect and go.
• Intertek-Tested & Certified: When it comes to easy installation and peace of mind, MRCOOL® stands alone as the ONLY company with patented pre-charged line set valves that have been tested and certified by Intertek. With the Intertek stamp of approval, homeowners and contractors alike can be sure that their pre-charged installation will be faster, safer, and fully compliant with industry standards.
  • Pre-Charged Valve Control Intertek Number: 5029931
    
  • Certified Under: UL STD 207 | CSA STD C22.2 # 140.3
    
• Mount Connect Enjoy: The MRCOOL® DIY® system features a simplified installation thanks to the patented Quick Connect® fittings that get you up and running in minutes. No waiting. No hassle. Just comfort, delivered fast.
• Gold Fin® Condenser - Corrosion Resistant: The Gold Fin® coil ensures that the DIY® condenser is engineered for resilience and built to withstand the test of time and the elements. From salty air to industrial zones, it resists long-term corrosion, so your comfort never fades.
• Coolant Alert - Leakage Detection: Your system knows before you do. If refrigerant levels drop, the MRCOOL® DIY will instantly alert you, protecting the compressor and preserving your comfort. Quietly brilliant, always vigilant.
• Any season, Any forecast: Engineered with intelligent climate control, the MRCOOL® DIY® automatically adjusts to maintain your perfect temperature, from freezing winters to scorching summers. It's not just comfort; it's climate mastery.
• Warmth even at -13°F: When temperatures get low, the MRCOOL® DIY® keeps you perfectly warm with a heating range of 62°F to 86°F. With reliable performance down to -13°F, you'll enjoy steady heat, smart control, and total comfort all winter long.
  
• Steady cooling, even at 122°F: When temperatures soar to 122°F, MRCOOL® DIY® stays chill - delivering unwavering cooling power where it's needed most all year long. From server rooms to sunrooms, it's dependable, intelligent, and always in control.
• Hands-free comfort, Activated: The MRCOOL® DIY® works with Amazon Alexa and Google Assistant, so you’re always in control without lifting a finger. Adjust the temperature, turn it on or off, or fine-tune your climate with nothing but your voice.
• Follow Me® Function - Comfort that knows where you are: MRCOOL® DIY® doesn't just cool the room - it cools your exact location. With Follow Me® mode, the system uses the remote as a sensor to track your exact location, adjusting airflow to keep you perfectly comfortable, wherever you go.
  
• Easy comfort that you can control from anywhere: Whether you're home, at work, or on the go, adjust your environment with a tap of your finger. Cool things down before you arrive, or change the temperature without leaving the couch using the MRCOOL SmartHVAC App available on IOS and Android (internet connection required).
  
• Auto restart: Outage? No need to worry. The MRCOOL® DIY® remembers your settings and powers back on automatically, so your comfort picks up right where it left off.
  
• Works with the MRCOOL® OuttaSight®: A discreet ceiling cassette that's the perfect fit for any room, the MRCOOL® OuttaSight® is a low-profile heating and cooling solution that doesn't require ductwork or take up wall space.
  
• Energy Efficient: The MRCOOL® DIY® minimizes energy waste, maximizing savings without sacrificing comfort. It's not just efficient, it's exceptionally efficient.
• Sleep mode: We made Sleep Mode easy to program. This saves you money and lets you and your family sleep a little easier.
• Best warranty in the business: The 5th Gen DIY® units offer a Registered Extended Limited Lifetime Warranty, 5 Years Base Parts Warranty, and a 7 Years Compressor Warranty, providing longer lasting protection for your system than any competing brand. - See full warranty details here
• Eligibility for IRA Tax Credit: Energy Star Certified, Energy Star Certified with Cold Climate Designation, and Potential Eligibility for IRA Tax Credit
  • AHRI Reference Number: #216032598
    • Non-Ducted Indoor Units Energy Guide
    • Non-Ducted Indoor Units AHRI Certificate

Frequently Asked Questions:

• Is the outdoor unit included with this bundle?: Yes, the MRCOOL® 55,000 BTU DIY 5th Generation 6 Zone Multi-Zone Mini Split Condenser 230V - DIY-MULTI6-55HP230D-O is included with this bundle.
• Does this system heat and cool? Yes, the outdoor unit included with this bundle is a Heat Pump, Heat Pumps provided both heating and cooling.
• What is the main difference between the 4th and 5th generation of DIY® mini-splits?: The 5th Gen DIY® series uses R-454B refrigerant, a more efficient and eco-friendly option than previous refrigerants like R-410A.
• What exactly is the MRCOOL® DIY®?: The MRCOOL® DIY® is the first and only true do-it-yourself heat pump system!
• Does the system include the communication wire to connect the indoor to the outdoor unit?: Yes, the bundled DIY systems will include the necessary communication wires to let the indoor and outdoor units communicate.

Five Zone Air Handler Combinations (in thousands BTU):

Included Outdoor Unit:

1x MRCOOL® 55,000 BTU DIY 5th Generation 6 Zone Multi-Zone Mini Split Condenser 230V - DIY-MULTI6-55HP230D-O

Our new 5th Generation MRCOOL® DIY® 55k BTU Multi-Zone Ductless Mini-Split Condenser is one of the most efficient and innovative units in the industry, and we’re excited to finally share it with you! On top of saving time and money because you won’t need an HVAC professional, this system will give you a good sense of accomplishment because you’ll have installed it yourself! The whole family will be able to enjoy the comfort of this condenser, because it can heat and cool up to 6 different spaces that equal up to 2290 sq. ft., giving you the ability to heat and cool an entire home to your exact specifications using a single MRCOOL® system. The system’s patented pre-charged Quick-Connect® line sets essentially fast-forward the installation of this system, enabling you to skip the evacuation and charging steps and simplifying the entire process. We utilize new R-454B refrigerant in these line sets, which is a much more environmentally friendly and efficient choice. Features like these assist this unit in achieving its impressive SEER2 of 22, and its HSPF2-4 of 10.6, both of which signify that this system will help you save money throughout the entire time you use it. These line sets are sold separately. Once you install this condenser, you’ll be met with a variety of features to help you control your comfort. One of these features is the Smart HVAC app, available on Apple and Android, that allows you to operate your system from the convenience of your phone. Set schedules, manage different modes, monitor energy consumption, and more all without having to leave the couch! You can also set up voice control through Amazon Alexa or Google Home, meaning you can control your comfort without moving a finger. This system ensures you’ll be enjoying ultimate convenience and superior comfort. The warranty for this unit is one of the best in the industry, and we’re proud to have your back. You can enjoy the peace of mind of a 5 year parts warranty, a 7 year compressor warranty, and, once you enroll in the MRCOOL® Care Program, a Limited Lifetime Replacement warranty. If you need perfect comfort but don’t want to break the bank, this MRCOOL® DIY® condenser is your answer!

Features:

• Intertek listed 5031495
  
• Easy DIY installation
  
• Future-proof your investment with the included DIYPro® cable, eliminating the need for electrical conduit.
  
• Keep the included remote close by, and MRCOOL DIY®'s Follow Me® function will track the air temperature around you to ensure maximum comfort.
  
• The MRCOOL® Smart HVAC Controller® Module and App fully support Google Assistant & Amazon Alexa out of the box.

Warranty:

• Registered Warranty: Extended Limited Lifetime (See full warranty details here)
  
• Base Parts Warranty: 5 Years (See full warranty details here)
• Compressor Warranty: 7 Years (See full warranty details here)

Optional Indoor Units:

MRCOOL® DIY® Series 5th Gen OuttaSight® 6,000 BTU 230V One-Way Ceiling Cassette - DIYCASSETTE06HP-230D25-O

The 5th Generation MRCOOL® DIY® Series OuttaSight® 6K BTU 230V One-Way Ceiling Cassette is a powerful and efficient climate control solution for spaces up to 200 sq. ft. Engineered for easy DIY installation, this system eliminates the need for specialized tools, making setup simple, cost-effective, and hassle-free. Designed to integrate seamlessly into multi-zone configurations, the cassette fits neatly between 16” ceiling joists, including pre-manufactured I-joists, for a clean, flush-mounted appearance. Unlike traditional ceiling cassettes that require extensive ductwork or inconvenient wall space, rethis unit offers a flexible installation ideal for both new builds and retrofit projects. The cassette pairs effortlessly with the MRCOOL® DIY® Quick Connect® line set, which comes pre-charged with R-454B, an environmentally friendly refrigerant that eliminates the need for vacuuming (MRCOOL® DIY® Quick Connect® line set sold separately). Advanced filtration enhances indoor air quality, while the Elevation function allows easy filter maintenance by lowering the panel for convenient access. With quiet operation and multiple control options—including a wireless remote, SmartHVAC app, and voice commands via Amazon Alexa and Google Assistant—this system offers personalized comfort. Backed by an industry-leading limited lifetime warranty, a 7-year compressor warranty, and a 5-year parts warranty, the MRCOOL® DIY® Outtasight® Ceiling Cassette delivers long-term reliability, advanced technology, and year-round comfort.

Features:

• Low Profile Installation
• Fits between 16" Ceiling Joists
• Works with Multi and Single Zone Systems
• Two-Stage DC motor
• Quiet Operation
• Multiple Operating Modes
• Remote Included
• Advanced Filtration
• Swing Technology

Warranty:

• Registered Warranty: Extended Limited Lifetime (See full warranty details here)
  
• Base Parts Warranty: 5 Years (See full warranty details here)
• Compressor Warranty: 7 Years (See full warranty details here)

MRCOOL® DIY® Series 5th Gen OuttaSight® 9,000 BTU 230V One-Way Ceiling Cassette - DIYCASSETTE09HP-230D25-O

The 5th Generation MRCOOL® DIY® Series OuttaSight® 9K BTU 230V One-Way Ceiling Cassette provides a powerful and efficient climate control solution for areas up to 400 sq. ft. Designed for simple installation, this unit eliminates the need for specialized tools, making setup quick, cost-effective, and straightforward. Made for multi-zone configurations, the cassette is engineered to fit seamlessly between 16” ceiling joists, including pre-manufactured I-joists, ensuring a discreet, flush-mounted appearance. Unlike conventional ceiling cassettes that require bulky ductwork or dedicated wall space, this unit offers versatile installation, making it a perfect choice for new construction or retrofit applications. This cassette works effortlessly with the MRCOOL® DIY® Quick Connect® line set, which is pre-charged with R-454B refrigerant, an eco-friendly solution that removes the need for vacuuming (MRCOOL® DIY® Quick Connect® line set sold separately). It features advanced filtration to improve indoor air quality, while the Elevation function makes filter maintenance easy by lowering the panel for hassle-free access. With whisper-quiet operation and multiple control options—including a wireless remote, SmartHVAC app, and voice control via Amazon Alexa and Google Assistant—this system ensures customized comfort. Supported by an industry-leading warranty, including a limited lifetime warranty, 7-year compressor warranty, and 5-year parts warranty, the MRCOOL® Outtasight® Ceiling Cassette guarantees long-lasting performance, modern technology, and year-round climate control.

Features:

• Low Profile Installation
• Fits between 16" Ceiling Joists
• Works with Multi and Single Zone Systems
• Two-Stage DC motor
• Quiet Operation
• Multiple Operating Modes
• Remote Included
• Advanced Filtration
• Swing Technology

Warranty:

• Registered Warranty: Extended Limited Lifetime (See full warranty details here)
  
• Base Parts Warranty: 5 Years (See full warranty details here)
• Compressor Warranty: 7 Years (See full warranty details here)

MRCOOL® DIY® Series 5th Gen OuttaSight® 12,000 BTU 230V One-Way Ceiling Cassette - DIYCASSETTE12HP-230D25-O

The 5th Generation MRCOOL® DIY® Series OuttaSight® 12K BTU 230V One-Way Ceiling Cassette is a sleek, efficient, and space-saving climate solution for areas up to 550 sq. ft. Engineered for easy installation, it seamlessly integrates into multi-zone systems, making it ideal for both new constructions and retrofit projects without requiring ductwork or wall space. Designed for discreet placement, this cassette mounts flush between 16” ceiling joists, including pre-manufactured I-joists, providing a clean, modern appearance while maximizing room layout flexibility. It connects effortlessly to the MRCOOL® DIY® Quick Connect® line set, which comes pre-charged with R-454B, a more environmentally friendly refrigerant, eliminating the need for vacuuming and reducing installation time (MRCOOL® DIY® Quick Connect® line set sold separately). With advanced filtration technology, this unit enhances indoor air quality, while the Elevation function lowers the filter panel for easy maintenance and cleaning. It operates quietly, ensuring a comfortable and peaceful environment in any room. The cassette is fully controllable through a wireless remote, SmartHVAC app, and voice commands via Amazon Alexa and Google Assistant, giving you ultimate convenience and customization. Backed by an industry-leading warranty, including a limited lifetime warranty, a 7-year compressor warranty, and a 5-year parts warranty, this system offers long-term dependability and year-round comfort.

Features:

• Low Profile Installation
• Fits between 16" Ceiling Joists
• Works with Multi and Single Zone Systems
• Two-Stage DC motor
• Quiet Operation
• Multiple Operating Modes
• Remote Included
• Advanced Filtration
• Swing Technology

Warranty:

• Registered Warranty: Extended Limited Lifetime (See full warranty details here)
  
• Base Parts Warranty: 5 Years (See full warranty details here)
• Compressor Warranty: 7 Years (See full warranty details here)

MRCOOL® DIY® Series 5th Gen OuttaSight® 18,000 BTU 230V One-Way Ceiling Cassette - DIYCASSETTE18HP-230D25-O

The 5th Generation MRCOOL® DIY® Series OuttaSight® 18K BTU 230V One-Way Ceiling Cassette provides efficient and powerful climate control for areas up to 800 sq. ft. Designed for effortless installation, it eliminates the need for specialized tools, offering a cost-effective and straightforward setup. Ideal for both multi-zone and single-zone applications, this unit fits seamlessly between 16” ceiling joists, including pre-manufactured I-joists, ensuring a flush, modern appearance. Unlike conventional ceiling cassettes that require extensive ductwork or valuable wall space, this system provides flexible installation, making it perfect for both new construction and retrofit projects. It connects effortlessly to the MRCOOL® DIY® Quick Connect® line set, pre-charged with R-454B, an eco-friendly refrigerant, eliminating the need for vacuuming and simplifying the installation process. Advanced filtration improves indoor air quality, while the Elevation function allows the filter panel to lower for easy maintenance and cleaning. With whisper-quiet operation and multiple control options—including a wireless remote, SmartHVAC app, and compatibility with Amazon Alexa and Google Assistant—this system ensures customized comfort. Supported by an industry-leading warranty, including a limited lifetime warranty, a 7-year compressor warranty, and a 5-year parts warranty, the MRCOOL® Outtasight® Ceiling Cassette offers reliable performance and year-round comfort.

Features:

• Low Profile Installation
• Fits between 16" Ceiling Joists
• Works with Multi and Single Zone Systems
• Two-Stage DC motor
• Quiet Operation
• Multiple Operating Modes
• Remote Included
• Advanced Filtration
• Swing Technology

Warranty:

• Registered Warranty: Extended Limited Lifetime (See full warranty details here)
  
• Base Parts Warranty: 5 Years (See full warranty details here)
• Compressor Warranty: 7 Years (See full warranty details here)

What's Included:

• 1x MRCOOL® 55,000 BTU DIY 5th Generation 6 Zone Multi-Zone Mini Split Condenser 230V - DIY-MULTI6-55HP230D-O
• (Optional) 5x MRCOOL® DIY® Series 5th Gen OuttaSight® 230V One-Way Ceiling Cassette Air Handlers
• (Optional) 5x Pre-Charged Linesets w/ DIY Pro Cable - R454B

MRCOOL® 55,000 BTU DIY 5th Generation 6 Zone Multi-Zone Mini Split Condenser 230V Specifications:

MRCOOL® DIY® Series 5th Gen OuttaSight® 6,000 BTU 230V One-Way Ceiling Cassette Specifications:

MRCOOL® DIY® Series 5th Gen OuttaSight® 9,000 BTU 230V One-Way Ceiling Cassette Specifications:

MRCOOL® DIY® Series 5th Gen OuttaSight® 12,000 BTU 230V One-Way Ceiling Cassette Specifications:

MRCOOL® DIY® Series 5th Gen OuttaSight® 18,000 BTU 230V One-Way Ceiling Cassette Specifications: