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Description
MRCOOL DIY 5th Gen Multi-Zone 6-Zone 55,000 BTU 22 SEER2 (6K + 6K + 6K + 6K + 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
4.7 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 5
BEST PILLOW OUT THERE! Great for back and side sleeping. So glad I found them!
Like a cloud! Really loving this pillow set! I have tried many different pillows trying to get rid of my neck pain to no avail. One of the pillows even had a chiropractor endorsing it - and then I found it was actually causing me jaw pain when I slept on my side because it was too firm and had no give. We are LOVING THIS CERVICAL NECK PILLOW! I have been using it consecutive nights as a back sleeper and side sleeper and my neck continues to feel pain-free, no cricks and when I sleep on my side there is no pressure on my jaw or shoulder pain. It has just enough support in all the right places and enough give in the center to allow my head to comfortably sink into the middle aligning my neck for comfort, and enough give it does not put pressure on my jaw from the side sleeping. It also came with 2 pillow cases that are soft - I love the way it keeps the frizzy of hair from developing around my face because my hair is sliding, rather than friction when I move in my sleep. This pillow is a Win-Win! Getting a set for my son too!
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Reviewed in the United States on May 19, 2026
★★★★★ 4
Great Pillows, But Made for Taller People
Clearly these pillows are high end, very well-made pillows that will last for, dare I say, decades, and they are supportive for the neck and spine... for some people. I got the set of two, one for myself and one for my husband. I am 5'4", about 165lbs, and he is 6'2" about 240lbs. So there is a big difference in size between us.
The pillows arrived in a very small but high quality box, each rolled separately, and I thought for sure that they would take a while to roll out, fluff up, and unwrinkle, the way our bed and other pillows did. But that wasn't the case at all. These pillows immediately fluffed up and were usable with not a single wrinkle (see photos). The silk gray cases that come with them were also in no way wrinkled and fit like a glove. They were a little difficult to situate for me (the cases) because they must go on a certain way (my husband wants me to tell y'all that he got it right the first time). It took me three tries. But once they were on, they looked beautiful and the pillows felt very soft with them on.
Now, that said, it was clear the moment I laid on it that it's made for someone taller, or rather, with a longer neck. When I lay on it, my head does not land on the center of the pillow where the bump is, where it's supposed to cradle my neck. My head instead lays directly on that bump, cocked up with my neck kinked. That's also because *I* am a side sleeper. Now if I lay on my back, my head lays a little more in the center. That is the only way this pillow slightly works for me. If you read the "instructions," it explains that there is a section for your head when you're laying on your back (the center dip) and a section for when you're on your side (the edges). Either way is too high for me. My neck isn't long enough. In order to get it into the correct position, I have to stretch it unnaturally. When I lay naturally, my neck is bent and kinked and hurts more in the morning than ever before.
The feel of it, putting aside its side and dimensions, is very soft to the touch but also quite firm at the same time. It's not the kind of memory foam that takes a while to bounce back. It's bounces back immediately. It's very springy.
The only way I can use this pillow is if I spin in around to keep the cervical support bump at the top and just lay over the flat portion, making it more like a regular pillow. It's still too high and stiff for me, but it's better.
Now for my husband (6'2"), this pillow works great! He's a back sleeper and it really supports his neck. And he does sometimes lay on his side, and apparently it's supports his neck then too. His neck is long enough to reach that edge section for side sleepers and the center supportive dip for back sleepers. He loves it! He says, his neck feels great in the morning and it's his new favorite pillow.
When I got this pillow set, it was listed at $340, and he said that it was not worth that price. But it is now listed at $169, and he's saying that is a much more reasonable price. I personally wouldn't pay that, but that's because the pillow doesn't work for me. I stand by my statement that these pillows are for taller people (or people with longer necks). But for him, he would pay it. I wish it worked for me. I'm a bit jealous, to tell you the truth.
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Reviewed in the United States on May 22, 2026
★★★★★ 5
Finally, a pair of pillows that look good on the bed and feel good on the neck.
As much as I like the comfort and support of a cervical neck pillow, they usually have a strange ufo-type look and are usually quite small. It's fine for use, but they are not a great look on the bed. I wanted something more welcoming and full-looking with the support of a c-pillow. This set actually met my hopes and needs.
I love how the pillow has two strengths - firmer on one side, softer on the other. That makes it easy to find the best fit for your own neck shape and support needs. The pillows are large enough that side-by-side on a queen sized bed they look welcoming and like they could probably even have matching cases put on them instead of requiring specialty industrial-looking pillow cases like many do.
Having proper neck support has reduced headaches and neck tension and allows for better sleep!
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Reviewed in the United States on June 1, 2026
★★★★★ 5
Perfect if you're in the right position, not so perfect otherwise
I've been using this for about a week and I like it, but with some caveats. It is shaped so you can only sleep in 2 positions and you can't really move in bed. As long as you are in the correct position, it is really comfortable and provides the best support you can ask for. The problem is if you move around in bed, it turns into a hinderance. With normal pillows, they more or less move with you and are comfortable as you move. This is very specifically great in a single position, but terrible in any other position. If you are able to keep still, this is the perfect pillow for you. If you are like me and roll around too much, its more of a problem for sleeping than a help. I am going to move it over to my couch for napping with, and I think it'll work out far better since the couch isn't really big enough to roll around.
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Reviewed in the United States on May 23, 2026
★★★★★ 5
Great quality
Size: Twin, Color: White
This mattress pad is just thick enough without being overly bulky which tends to bunch up after washing. It is super soft and fits twin bed perfectly with just enough padding to add comfort. For a waterproof cover this one is superior to others I've had.
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Reviewed in the United States on March 16, 2026