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Description
MRCOOL DIY 5th Gen Multi-Zone 6-Zone 55,000 BTU 22 SEER2 (6K + 6K + 9K + 9K + 9K + 9K) 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 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
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]
- Please click here for more details>>> Return & Exchange Policy
4.0 ★★★★★
Based on 2145 reviews
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Product Reviews
★★★★★ 5
Perfect size for small dogs to play solo or gentle tug of war.
Color: Alligator(Green)
I ordered this toy for my dog. She is a 13 pound Shih Tzu mix The toy has nice soft fluffy, short fur and a mix of different textures that I feel when she’s playing with it helps keep her teeth clean.
She loves the squeakers. She loves to squeak squeakers!! The tail is great for playing a gentle game of tug-of-war. I know she enjoys this toy because whenever she wants to play, she’ll bring it over to me and pop it in my lap. If I don’t respond, she’ll start pawing on my leg until I acknowledge her.
Whether I throw it across the room or engaged in some tug-of-war, it keeps her entertained & stimulated. A great boredom buster!
She’s been playing with it now for over a month and so far the squeaker still squeaks, and there are no holes or tears in the toy.
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Reviewed in the United States on March 11, 2026
★★★★★ 1
It didn’t work
Color: Duck(Yellow)
Seeker didn’t work
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Reviewed in the United States on April 10, 2026
★★★★★ 4
Dog didn’t like sound it makes
Color: Duck(Yellow)
I ordered the duck. It’s yellow and a good size for small to medium dogs. It is well made but as the information states this is for gentle chewers.
I have a yorkie poo who thinks he is a big dog and likes toys bigger than himself and this fit the bill until…he heard the sound it makes. He didn’t like it and now refuses to play with it. 🤷🏻♀️ So the 4 stars because he did like it and did play with it. Minus one because of the sound he doesn’t care for. I will need to cut it open if I want him to play with it again. As of right now he doesn’t want to get near it.
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Reviewed in the United States on February 6, 2026
★★★★★ 5
Not actually for aggressive chewers
Color: Alligator(Green)
*sigh* Yet ANOTHER toy that's marketed for aggressive chewers that doesn't live up to its claims. My 50-lb goldendoodle put a hole in the plush part of this alligator toy in under 3 minutes, and that was just from normal chewing and not the tooth gnashing with her molars that she usually does.
So why 5 stars still? Because after that initial hole was created, we've asked her to be gentle with it, and she's done a fairly good job, leading to a toy that is still intact that she absolutely LOVES. No kidding, this is her new favorite "baby," although I do suspect that the next new toy she gets will then become her new favorite. Kids, amirite?
Anyway, I suspect that she loves this toy so much (aside from the fact that it's the newest one) because it's kind of like 2 toys in 1. She has a large rope toy that she adores and only gets to play with when closely supervised because otherwise she uses her teeth to effectively cut through all of the individual rope strings in no time flat. This kind of mimics that texture, but she gets to play with this one to her heart's content and so far hasn't done any appreciable damage to it. She also loves the texture of plush toys, and this one is large enough that she can really grab it in her mouth, but not so big that it takes any effort to carry around.
The squeaker has somehow managed to remain alive, and I attribute that to her being asked to be more gentle with this toy, since usually, the reason why she's making holes in plushies is to dig that most cherished little plastic squeaker out of her toys' guts.
This is actually a pretty expensive dog toy, though the current coupon price brings it to just under $15, which seems more reasonable, but still kind of pricey for something that your dog may chew completely through in 10 minutes.
If you don't have an aggressive chewer, this is a pretty great toy. If you do, be prepared to pay for a toy that will become a pile of innards in pretty short order.
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Reviewed in the United States on January 31, 2026
★★★★★ 5
Well-Made Toy That My Dog Loves, Great Quality and Fun
Color: Alligator(Green), Color: Alligator(Green)
This dog toy has been a great addition to our pup’s collection. It’s well made and feels like solid quality that will stand up to regular play, which is exactly what you want rather than something that falls apart after a few uses.
My Havanese absolutely loves it. The size is just right for small to medium-sized dogs, and we’ve had a lot of fun with tug-of-war and gentle fetch sessions. The texture and feel give her something satisfying to bite and carry around.
Pros:
Well made and durable, feels like it will last through many play sessions.
Great size for small to medium dogs like my Havanese.
Encourages play and interaction, perfect for tug-of-war and light fetch.
Nice value for the quality and price.
Easy to grip for both dog and human hands.
Cons:
Not ideal for extreme chewers; if your dog loves to destroy toys quickly, you might need a super-heavy-duty option.
A bit simple in design, no squeaker, but that’s just personal preference.
Overall, this is a solid, fun toy that delivers on quality and performance, and my dog genuinely enjoys it. Highly recommend. Still gets 5 stars!
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Reviewed in the United States on January 24, 2026