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Description
MRCOOL DIY 5th Gen Multi-Zone 6-Zone 55,000 BTU 22 SEER2 (6K + 6K + 6K + 9K + 9K + 18K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling CassettesThe MRCOOL DIY 5th Gen 55,000 BTU 6 Zone Ceiling Cassette Mini Split System is the largest capacity DIY unit available, capable of heating and cooling up to six individual zones with precision and efficiency. Designed for powerful whole home performance, it combines a high output condenser with your choice of low profile ceiling cassette air handlers all with smart control and DIY installation in mind. This system supports any combination of 6K, 9K,
The MRCOOL DIY 5th Gen 55,000 BTU 6-Zone Ceiling Cassette Mini-Split System is the largest capacity DIY unit available, capable of heating and cooling up to six individual zones with precision and efficiency. Designed for powerful whole-home performance, it combines a high-output condenser with your choice of low-profile ceiling cassette air handlers — all with smart control and DIY installation in mind.
This system supports any combination of 6K, 9K, 12K, and 18K ceiling cassettes, allowing full customization for bedrooms, living rooms, garages, offices, or large open spaces. With a 21.5 SEER2 rating, it maximizes efficiency while delivering serious comfort even in extreme weather conditions.
Whether you’re retrofitting an older home or building out a modern multi-room system, this DIY 6-zone setup offers unmatched versatility — without the need for a pro HVAC installer.
Key Features:
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Supports six indoor zones with a single 55K condenser
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Compatible with 6K, 9K, 12K, and 18K ceiling cassette units
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21.5 SEER2 energy efficiency for lower utility bills
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Ideal for large homes, offices, shops, or multi-room spaces
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Flush-mounted ceiling cassettes blend seamlessly into any décor
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DIY installation with included quick-connect fittings
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Operates in extreme temperatures: heats to -13°F, cools to 122°F
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App, Alexa, and Google Assistant smart control integration
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Corrosion-resistant Gold Fin® condenser coating
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Backed by 5-year parts and 7-year compressor warranty
| BRAND NAME | MRCOOL |
| SERIES | DIY 5th gen Multi-Zone Mini-splits |
| MODEL | DIY-MULTI6-55HP230D-O |
| GTIN | 840255587488 |
| UPC | 840255587488 |
| SHORT DESCRIPTION | MRCOOL® 55k DIY 5th Generation 6 Zone Multi-Zone Mini-Split Condenser 230v |
| LONG DESCRIPTION | 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! |
| FEATURE LIST | 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. |
| SEER2 | 22 |
| EER2 | 12 |
| HSPF2-4 | 10.6 |
| HSPF2-5 | 8.5 |
| TONNAGE | 4.6 |
| COOLING CAPACITY (BTU) | 47000 |
| HEATING CAPACITY (BTU) | 55000 |
| VOLTAGE (V) | 208/230 |
| PHASE | 1 |
| CYCLE | 60 |
| MAX FUSE BREAKER (A) | 45 |
| MIN CIRCUIT AMPACITY (A) | 43 |
| COLOR | White |
| ZONE CAPACITY | 6 |
| REFRIGERANT TYPE | R-454B |
| REFRIGERANT VOLUME (OZ) | 151.68 |
| DECIBEL RATING (DBA) | 64 |
| INVERTER | DC |
| LINE SET LENGTH | 25 |
| MAX LINESET LENGTH (FT) | 221.4 |
| LIQUID LINE SIZE | 1/4 |
| SUCTION LINE SIZE | (3/8 X4) (1/2 X2) |
| COMPRESSOR MOTOR TYPE | Rotary |
| AUXILIARY HEATER INCLUDED | No |
| AUXILIARY HEATER AVAILABLE | No |
| FAN ONLY OPTION | Yes |
| QUIET MODE | Yes |
| AUTO COOL | Yes |
| WIFI COMPATIBILITY | Yes |
| APP COMPATIBILITY | Yes |
| WORKS WITH IOS | Yes |
| WORKS WITH ANDROID | Yes |
| UL LISTED | Yes |
| ETL LISTED | Yes |
| ENERGY STAR CERTIFIED | Yes |
| AHRI CERTIFIED | Yes |
| REGISTERED WARRANTY | Extended Limited Lifetime* |
| BASE PARTS WARRANTY | 5 |
| BASE COMPRESSOR WARRANTY | 7 |
| HAS BATTERIES | Yes |
| CONTAINS ELECTRONICS | Yes |
| CONTAINS CHEMICALS | Yes |
| CONTAINS AEROSOL | Yes |
| CONTAINS COMPRESSED GAS | Yes |
| PROPOSITION 65 WARNING | Yes |
| NET DEPTH (IN) | 16.34 |
| NET HEIGHT (IN) | 52.48 |
| NET WIDTH (IN) | 37.48 |
| NET WEIGHT (LBS) | 245.81 |
| GROSS DEPTH (IN) | 19.49 |
| GROSS HEIGHT (IN) | 58.27 |
| GROSS WIDTH (IN) | 43.11 |
| GROSS WEIGHT (LBS) | 267.46 |
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
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4.6 ★★★★★
Based on 27 reviews
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Product Reviews
★★★★★ 5
This is an invaluable tool for Network Admins.
Format: Paperback
This is a great book for Network Administrators who also have Cybersecurity Training to better protect their networks. I work for a smaller school district and this book has been invaluable.
Edward Baker Southern Local Schools.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 27, 2026
★★★★★ 5
A must-read for professionals seeking to stay ahead in a rapidly evolving landscape.
Format: Kindle
“ChatGPT for Cybersecurity Cookbook” by Clint Bodungen offers a well-organized, practical deep dive into the integration of generative AI, specifically ChatGPT, within cybersecurity. From the perspective of a cybersecurity professional, this book stands out as a valuable resource for anyone looking to modernize and automate many of the repetitive tasks in cybersecurity, such as threat analysis, vulnerability management, and policy creation.
The book’s greatest strength lies in its focus on practical, actionable “recipes.” Each chapter walks you through real-world use cases for applying ChatGPT to cybersecurity operations. For instance, Bodungen effectively demonstrates how to automate penetration testing and vulnerability assessments using AI-driven techniques, something that can significantly streamline the red team’s workflow . The book’s use of LangChain for parsing and analyzing vulnerability reports, as well as integrating AI for governance, risk, and compliance (GRC) assessments, provides blue teams with a powerful set of tools for enhancing their day-to-day operations .
One of the highlights is how the author tackles threat intelligence, using ChatGPT alongside the MITRE ATT&CK framework, which can help automate complex tasks like identifying and categorizing threat actors and their tactics, techniques, and procedures (TTPs). For any seasoned cybersecurity analyst, this can save a lot of time and reduce human error when managing large volumes of data .
However, it’s important to note that the book assumes a decent understanding of Python and core cybersecurity concepts. It’s not for absolute beginners but provides significant value for professionals looking to integrate AI into their operations more efficiently.
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Reviewed in the United States on October 17, 2024
★★★★★ 5
A Career-Changing Read for Cybersecurity Professionals
Format: Paperback
This book completely changed the trajectory of my career. As a self-taught security professional with 30 years of experience, I found myself feeling stagnant and losing interest in cybersecurity. The rapid changes in the field made me question my next steps, and I had zero knowledge of Generative AI, let alone its applications in cybersecurity.
Then, the week this book was released, I bought it—and told no one. It was my personal experiment, a chance to dive into something new. Since then, I’ve read multiple books on Generative AI for Cyber, applied the concepts, and expanded my expertise.
Today, I am considered the SME for Cyber AI in my organization, actively participating in AI working groups, and regularly speaking, mentoring, and presenting on the topic.
In fact, I was the third reviewer of this book (5 stars) and deleted the review after about a week. I didn’t want someone who knew me to connect the review to me and figure out how I got so smart on the topic so quickly. Now, I’m back, giving it the review it truly deserves.
This book reignited my passion for cybersecurity and relaunched my career. If you're in cyber and looking for a way to break through stagnation or explore the future of AI in security, this is the book that could redefine your path—just like it did for me.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 4, 2025
★★★★★ 5
Clint is the Real Deal and this is an Excellent Book!
Format: Paperback, Format: Paperback
Clint knows his stuff, and I’ve also taken his accompanying training course. This book will give you some insights in how to apply a variety of techniques around ChatGPT and other engines and how to use them effectively in your job. Highly recommended!
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Reviewed in the United States on June 21, 2024
★★★★★ 3
Happy to have the book - damaged though
Format: Paperback, Format: Paperback
Excited to dive into this book but don’t love that it’s damaged.
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Reviewed in the United States on October 19, 2024