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MRCOOL®

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MRCOOL DIY 5th Gen Multi-Zone 6-Zone 55,000 BTU 22 SEER2 (9K + 9K + 12K + 12K + 12K + 18K) Ductless Mini Split Heat Pump & Air Conditioner with Ceiling Cassette Units

50 in stock

$12,455.00 $15,444.20 You save $2,989.20
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MRCOOL DIY 5th Gen Multi-Zone 6-Zone 55,000 BTU 22 SEER2 (9K + 9K + 12K + 12K + 12K + 18K) Ductless Mini-Split Air Conditioner & Heat Pump with Ceiling Cassettes

The MRCOOL DIY 5th Generation 55,000 BTU 6-Zone Ceiling Cassette Mini-Split System provides whole-home comfort and industry-leading efficiency — no professional installation required. This complete configuration pairs a powerful 55K BTU condenser with six low-profile ceiling cassette air handlers in a (9K + 9K + 12K + 12K + 12K + 18K) layout to perfectly balance cooling and heating across every space.

Built for DIY installation using MRCOOL’s patented Quick-Connect® pre-charged line sets, this 22 SEER2 system eliminates the need for vacuuming or refrigerant charging. Ideal for homes, garages, and offices, it offers whisper-quiet performance, smart control via app, Alexa, or Google Assistant, and dependable operation from −13 °F to 122 °F.

Key Features & Benefits

  • ✔ 6-Zone kit configuration (9K + 9K + 12K + 12K + 12K + 18K) with 55K BTU outdoor unit.
  • ✔ 22 SEER2 efficiency and 10.6 HSPF2-4 rating for lower energy bills.
  • ✔ Heats to −13 °F and cools to 122 °F for reliable comfort throughout the year.
  • ✔ Quick-Connect® R-454B line sets — no vacuum pump or refrigerant required.
  • ✔ Flush-mounted ceiling cassette air handlers for a clean, modern look.
  • ✔ Smart HVAC App control with Alexa & Google Assistant compatibility.
  • ✔ DIYPro® cable included — no electrical conduit needed.
  • ✔ Gold Fin® anti-corrosion coating extends condenser life.
  • ✔ Follow Me® remote sensor tracks ambient temperature for precise comfort.
  • ✔ Energy Star, AHRI & ETL listed for verified efficiency and safety.
💡 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 app and voice control. Use the MRCOOL or SmartHVAC app to schedule runtimes, adjust zones, and control temperature via 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 + 9K + 12K + 12K + 12K + 18K)
  • Total BTU Capacity: 55,000 Heating / 47,000 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 5031495, UL Listed
  • 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.
Enjoy fast nationwide delivery, expert support, and factory-fresh equipment backed by strong warranty protection.

 

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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.

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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.

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