SKU: 44376339831

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 Cassettes

Sale price$5606.10 Regular price$6229.00
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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:
  1. 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
SKU: 44376339831

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Leah Ann Dillin
Lowell, US
★★★★★ 5
Cool and comfy
Color: Blue-ice Plus, Size: King(Pack of 1)
Great pillow. Keeps you cool.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
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Rene
Omaha, US
★★★★★ 5
Really Good Cooling Pillows for Sleeping
Color: Blue-ice Plus, Size: Queen(Pack of 2), Color: Blue-ice Plus, Size: Queen(Pack of 2)
These cooling pillows are very soft and provide excellent support for your head and neck. They are adjustable by taking our the stuffing if you need them to be more flat or less firm. The look great and comes in a pack of two which is a great value. During use, I did notice they have great shape retention and it does not take them long to return to their fluffy full shape. I am a hot sleeper and these do keep your head cool - just be aware using a pillow cover does reduce the cool ability but this allows you to adjust for weather like during winters to add a pillow case for extra warmth. Very happy with this purchase and got a second set to replace my old pillows.
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Reviewed in the United States on April 28, 2026
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Akeem
Carnegie, US
★★★★★ 5
Comfortable and stays cool
Color: White-cooling Basic, Size: Queen(Pack of 1)
Great pillow. When i opened it, i noticed a strange smell, i assumed its the smell of whatever they use to make the pillow stay cool. You have to fluff it for a good amount of time to make sure the cooling agent spreads well in the foam. Is what i assumed atleast. Its a perfect amount of softness for me. Pair it with some bamboo pillow cases and you got a good night of sleep
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Reviewed in the United States on May 9, 2026
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Kim Groetsch
Carnegie, US
★★★★★ 5
BEST, MOST COMFORTABLE PILLOWS EVER!
Color: White-cooling Basic, Size: Queen(Pack of 2)
I've used others.BEST PILLOWS EVER! Firm, cooling and supportive. LOVE THESE!
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Reviewed in the United States on May 28, 2026
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Juanita
Pawtucket, US
★★★★★ 4
Comfortable and Supportive, but Adjust the Filling
Color: White-cooling Basic, Size: Queen(Pack of 2), Color: White-cooling Basic, Size: Queen(Pack of 2)
I’m very happy with this pillow. The size is big and it feels soft while still providing good support, perfect for midnight scrolling on TikTok. One thing to keep in mind is that it can feel a little too tall if you use all of the filling that comes with it. The good news is that you can easily adjust the amount of filling to find the height that works best for your sleeping position. Once I customized it, it was much more comfortable. Overall, great quality, comfortable, and worth the purchase.
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Reviewed in the United States on June 3, 2026

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