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Description
MRCOOL DIY 5th Gen Multi-Zone 6-Zone 55,000 BTU 22 SEER2 (12K + 12K + 12K + 12K + 12K + 12K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling CassettesMRCOOL DIY 5th Gen 55,000 BTU 6 Zone Ceiling Cassette Mini Split System DIY MULTI6 55HP230D O The MRCOOL DIY 5th Gen 55,000 BTU 6 Zone Ceiling Cassette Mini Split is the largest capacity DIY multi zone system available. Pair the high output condenser with your choice of low profile ceiling cassette air handlers to heat and cool up to six individual zones with whisper quiet performance, premium efficiency, and true DIY installation. Mix and match 6K,
MRCOOL DIY 5th Gen 55,000 BTU 6-Zone Ceiling Cassette Mini-Split System | DIY-MULTI6-55HP230D-O
The MRCOOL DIY 5th Gen 55,000 BTU 6-Zone Ceiling Cassette Mini-Split is the largest-capacity DIY multi-zone system available. Pair the high-output condenser with your choice of low-profile ceiling cassette air handlers to heat and cool up to six individual zones with whisper-quiet performance, premium efficiency, and true DIY installation.
Mix and match 6K, 9K, 12K, and 18K cassette sizes for bedrooms, living areas, offices, shops, garages, or large open spaces. With up to 22 SEER2 cooling efficiency and HSPF2-4 10.6, this system delivers serious comfort while helping lower utility bills — even in extremes (heats to -13°F, cools to 122°F).
Key Features & Benefits
- ✔ 6 zones from a single 55K condenser for whole-home or multi-room comfort.
- ✔ Compatible with 6K / 9K / 12K / 18K ceiling cassette air handlers (flush-mount, low-profile).
- ✔ Up to 22 SEER2, HSPF2-4 10.6, HSPF2-5 8.5 for excellent efficiency.
- ✔ Quick-Connect® pre-charged line sets: no vacuum pump, no charging required (sold separately).
- ✔ DIYPro® cable included — eliminates electrical conduit for easier installs.
- ✔ Smart control with app, Alexa, and Google Assistant; Energy usage stats & scheduling.
- ✔ Gold Fin® anti-corrosion coating on the condenser for long life.
- ✔ Follow Me® remote tracks temp around you for pinpoint comfort.
- ✔ Energy Star, AHRI, ETL/UL listed for verified performance.
- ✔ Strong warranty: 5-yr parts, 7-yr compressor, and extended Limited Lifetime with MRCOOL® Care enrollment.
💡 Pro Tip: MRCOOL DIY ceiling cassettes include the WMK-19 Smart HVAC Wi-Fi Controller (plug-and-play). Connect it to your air handler, pair to Wi-Fi, and control the system via the MRCOOL or SmartHVAC apps — with built-in Alexa and Google voice support.
Technical Specifications
- Brand / Series: MRCOOL — DIY 5th Gen Multi-Zone Mini-Splits
- Model (Condenser): DIY-MULTI6-55HP230D-O
- Cooling / Heating Capacity: 47,000 BTU / 55,000 BTU
- Zones: Up to 6
- Efficiency: SEER2 22; EER2 12; HSPF2-4 10.6; HSPF2-5 8.5
- Refrigerant: R-454B (151.68 oz)
- Electrical: 208/230V, 1-Phase, 60 Hz; Min. Circuit Ampacity 43A; Max Fuse/Breaker 45A
- Sound Rating: 64 dBA
- Line Set Compatibility: 25 ft standard; max combined length 221.4 ft
- Line Sizes: Liquid 1/4"; Suction: (3/8" × 4) and (1/2" × 2)
- Inverter Compressor: DC Rotary
- Operating Range: Heat to −13°F; Cool to 122°F
- Certifications: Energy Star, AHRI, ETL/UL, Intertek Listed 5031495
- Smart Control: Wi-Fi, App, Alexa, Google Assistant (WMK-19)
- Color: White
- Condenser Dimensions (WxHxD): 37.48" × 52.48" × 16.34" (Net)
- Condenser Weight: 245.81 lbs (Net)
- Shipping Dimensions (WxHxD): 43.11" × 58.27" × 19.49" (Gross)
- Shipping Weight: 267.46 lbs (Gross)
- Warranty: 5-yr parts / 7-yr compressor; Extended Limited Lifetime with MRCOOL® Care (registration required)
- SKU / UPC / GTIN: DIY-MULTI6-55HP230D-O / 840255587488 / 840255587488
Note: Quick-Connect® pre-charged line sets and ceiling cassette air handlers are sold separately to build your ideal 6-zone package.
Why buy from MRCOOL DIY Direct? Genuine MRCOOL equipment, expert support, and nationwide delivery — perfect for DIYers who want pro-level results without pro-level labor costs.
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
4.1 ★★★★★
Based on 2009 reviews
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Product Reviews
★★★★★ 5
We’re happy!
For the price, this suit was great. My son is a bigger guy and when we rent tuxes, the pants always look terrible. This one, we were happy with. He usually wears a 2x in clothes but we sized up to the 3x. He’s 6’2” and prob 270. Maybe more but the vest was still a little snug.
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Reviewed in the United States on October 14, 2025
★★★★★ 5
Caviar and Champagne look for a hot dog and beer price!!
Color: Black (Stretch Fabric), Size: Large
At this point in my life, my days of spending close to $1K for a suit are over. Now, more worried about saving enough money for retirement AND my two kids' college funds. So when I was invited to a "black tie affair" I thought, "Crap. I don't own a tuxedo and will have to rent." Calling my local tux rental shop, I was SHOCKED at how much a one-night rental would cost (average $150/night - yes, it's been over 20 plus years since I had to rent a tux but wow)! So my wife suggested I look on Amazon and see if there was something that might work.
After seeing the reviews for the YND Slim Fit tuxedo, I decided to take a chance. And boy, am I glad I did!! I have been thoroughly impressed. The value for money is outstanding—this suit offers a high-end look and impeccable fit at a fraction of the cost compared to suits 10 times its price.
The suit exudes sophistication and style, making a powerful statement. The attention to detail in design is evident, and the finish is almost on par with luxury suits that come with a hefty price tag. The fit is nicely tailored for an "off-the-rack" suit, not too boxy or not too "slim" (I'm 6'0, 190lbs, and purchased the 'Large'). The suit highlights the best features while providing optimum comfort.
In summary, this suit is a true gem, offering exceptional value, a remarkable look, a superb fit, and style that rivals much more expensive options. Highly recommended for those seeking quality without breaking the bank.
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Reviewed in the United States on October 13, 2023
★★★★★ 5
Very happy with it
Color: Black (Stretch Fabric), Size: Small, Color: Black (Stretch Fabric), Size: Small
Very nice suit! Pay attention to the measurements and sizing! It worked out great for a prom suit. It did come with a vest, tie and cuff links also.
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Reviewed in the United States on May 2, 2026
★★★★★ 5
Gorgeous But Size Up
Color: Burgundy (Stretch Fabric), Size: Small
The suit has a beautiful, rich burgundy color — truly eye‑catching and elegant. Unfortunately, the fit was a major issue. I recommend sizing up at least one size, especially if you have fuller thighs or glutes. The pants were very tight in the thigh and buttocks area, the vest didn’t cover the lower hip area, and the jacket sleeves ran short with a tight fit in the shoulders. Overall, the small felt more like a youth small rather than an adult small.
Our set also did not include the pocket square as advertised, though it did come with a white dress shirt and a mini black tie with a matching pocket square. The material itself felt okay — not bad, but not great.
We really wanted to love this suit because the color is gorgeous, but due to the sizing inconsistencies and missing item, we couldn’t keep it.
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Reviewed in the United States on May 20, 2026
★★★★★ 2
It stains white shirt
Color: Burgundy (Stretch Fabric), Size: Large
Nice suit, but Very dissatisfied the color is not fast. It stained my husbands white shirt when he used it for a recent event.
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Reviewed in the United States on January 27, 2026