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MRCOOL®

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MRCOOL DIY 5th Gen Multi-Zone 6-Zone 55,000 BTU 22 SEER2 (9K + 12K + 12K + 12K + 12K + 12K) Ductless Mini Split Heat Pump & Air Conditioner with Ceiling Cassette Units

50 in stock

$12,447.00 $15,434.28 You save $2,987.28
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MRCOOL DIY 5th Gen Multi-Zone 6-Zone 55,000 BTU 22 SEER2 (9K + 12K + 12K + 12K + 12K + 12K) Ductless Mini-Split Air Conditioner & Heat Pump with Ceiling Cassettes

Build your dream comfort system with the MRCOOL DIY 5th Gen 6-Zone 55,000 BTU 22 SEER2 Ductless Mini-Split System — a complete package featuring six ceiling cassette air handlers (9K + 12K + 12K + 12K + 12K + 12K) paired with the powerful DIY-MULTI6-55HP230D-O condenser. Perfect for large homes, shops, or offices, this Energy Star–certified system delivers professional-grade performance with true DIY installation.

Each ceiling cassette installs flush within the ceiling for a clean, low-profile finish, while the system’s Quick-Connect® pre-charged line sets simplify installation — no vacuum pump or refrigerant handling required. Enjoy whisper-quiet comfort, smart-home control, and year-round efficiency even in extreme climates.

Key Features & Benefits

  • ✔ Complete 6-Zone kit (9K + 12K + 12K + 12K + 12K + 12K) with 55K BTU outdoor unit.
  • ✔ 22 SEER2 / 10.6 HSPF2-4 efficiency for lower energy bills.
  • ✔ Heats to −13 °F and cools to 122 °F for all-season performance.
  • ✔ Quick-Connect® R-454B line sets — no vacuum or charging required.
  • ✔ Ceiling cassette air handlers mount flush for a clean, modern look.
  • ✔ Smart control via app, Alexa & Google Assistant.
  • ✔ DIYPro® cable eliminates the need for electrical conduit.
  • ✔ Gold Fin® anti-corrosion coating extends unit lifespan.
  • ✔ Follow Me® remote sensor tracks room temperature for personalized comfort.
  • ✔ AHRI & ETL listed, Energy Star certified for verified performance.
💡 Pro Tip: Every MRCOOL DIY ceiling cassette includes the WMK-19 Smart HVAC Wi-Fi Controller — a plug-and-play adapter that connects directly to the air handler for instant Wi-Fi access. Just plug it in and connect through the MRCOOL or SmartHVAC app to enable scheduling, usage tracking, and voice control with Alexa or Google Assistant.

Technical Specifications

  • Brand / Series: MRCOOL DIY 5th Gen Multi-Zone Mini-Split
  • Outdoor Model: DIY-MULTI6-55HP230D-O
  • Indoor Models: Ceiling Cassettes (9K + 12K × 5)
  • Total BTU Capacity: 55,000 BTU Heating / 47,000 BTU Cooling
  • Zones: 6
  • Refrigerant: R-454B (Pre-Charged Quick-Connect)
  • Voltage: 208/230 V 1 Ph 60 Hz
  • Efficiency: 22 SEER2 | EER2 12 | HSPF2-4 10.6 | HSPF2-5 8.5
  • Operating Range: Heat to −13 °F | Cool to 122 °F
  • Sound Level: 64 dBA (Outdoor Unit)
  • Compressor: DC Inverter Rotary
  • Line Set Length: 25 ft each standard | Max total 221.4 ft
  • Certifications: Energy Star, AHRI, ETL Listed 5031495, UL
  • Warranty: 5-Year Parts | 7-Year Compressor | Limited Lifetime with MRCOOL Care registration
Buy from this retailer — America’s trusted source for genuine MRCOOL systems. Get fast nationwide delivery and expert DIY support for every install.

 

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Return Policy

30-Day Returns

We accept returns within 30 days of delivery. Items must be unused, in their original packaging, and in the same condition as received.

How to Initiate a Return

Contact our support team at sales@homecrucial.com with your order number and reason for return. We will provide a prepaid return label within 1–2 business days.

Refunds

Refunds are processed within 5–7 business days after we receive the returned item. The refund will be issued to your original payment method.

Non-Returnable Items

Items that have been installed, used, or damaged after delivery are not eligible for return.

Warranty

Manufacturer's Warranty

All products sold at Home Crucial are covered by the manufacturer's warranty. Warranty terms vary by brand and product — please refer to the documentation included with your product for specific details.

What Is Covered

Manufacturer warranties typically cover defects in materials and workmanship under normal use and conditions. Coverage does not include damage caused by misuse, improper installation, or normal wear and tear.

Warranty Claims

To initiate a warranty claim, contact us at sales@homecrucial.com with your order number, a description of the issue, and photos if applicable. We will coordinate with the manufacturer on your behalf.

Extended Protection

Extended warranty and protection plans may be available for select products. Contact us for more details.

Customer Reviews

★★★★★  4.9 out of 5  ·  20 reviews

High-efficiency 5th Gen ENERGY STAR® rated DIY mini split heat pumps.

  • Outdoor esthetics do matter.

  • Create your bundle with ease.

  • Authorized Dealer of Mr Cool™.