MRCOOL DIY 5th Gen 55,000 BTU 4-Zone Ductless Mini Split Air Conditioner and Heat Pump with 9K+12K+12K+12K BTU Ceiling Cassette Indoor Units

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. 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.

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. 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
  

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. 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
  

The MRCOOL 5th Gen DIY Line Set is a required component for installing your MRCOOL DIY ductless mini-split system. This 16-foot model is pre-charged with environmentally friendly R-454B refrigerant and works with MRCOOL's DIY 5th Gen 6K, 9K and 12K air handler units, featuring 1/4” liquid and 3/8” suction lines.

Equipped with Quick Connect fittings, the line set allows for fast, tool-free installation—no vacuuming, charging, or special certifications needed. Built with durable, kink-resistant materials and a leak-proof design, it ensures long-lasting, efficient performance. Available in multiple lengths, it’s the key to making your HVAC setup truly DIY-friendly.

This remote is included with each air handler in MRCOOL's 5th Generation DIY or Advantage Mini Split Systems.