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MRCOOL®

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

50 in stock

$12,425.00 $15,407.00 You save $2,982.00
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  • 🗐 Manufacturer Warranty Included
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  • 30-Day Return Policy

MRCOOL DIY 5th Gen 55,000 BTU 6-Zone Ceiling Cassette Mini-Split System | DIY-MULTI6-55HP230D-O

The MRCOOL DIY 5th Generation 55,000 BTU 6-Zone Ceiling Cassette Mini-Split System is the largest-capacity DIY system MRCOOL has ever produced — engineered for whole-home comfort and true do-it-yourself installation. Perfect for homeowners who want professional-grade performance without professional labor, this high-efficiency system pairs a 55K BTU condenser with your choice of low-profile ceiling cassette air handlers for quiet, concealed heating and cooling.

Designed around MRCOOL’s revolutionary Quick-Connect® pre-charged line sets, installation is fast, clean, and safe — no vacuum pump or refrigerant tools required. With a 21.5 SEER2 rating and R-454B refrigerant, this 6-zone system delivers powerful comfort, high efficiency, and eco-friendly performance year-round.

Key Features & Benefits

  • ✔ Supports up to six indoor zones with one 55K BTU condenser.
  • ✔ Compatible with 6K, 9K, 12K, and 18K ceiling cassette units for flexible room coverage.
  • ✔ 21.5 SEER2 / 10.6 HSPF2-4 efficiency rating for reduced energy costs.
  • ✔ Heats to −13°F and cools to 122°F for dependable year-round performance.
  • ✔ Flush-mounted ceiling cassettes blend seamlessly with your interior design.
  • ✔ Smart control through the MRCOOL app, Alexa, or Google Assistant.
  • ✔ Gold Fin® anti-corrosion coating for extended outdoor durability.
  • ✔ DIYPro® cable included — simplifies wiring without conduit.
  • ✔ Energy Star, AHRI, and ETL listed for performance and safety verification.
  • ✔ 5-Year Parts and 7-Year Compressor Warranty (Lifetime optional with MRCOOL Care).
💡 Pro Tip: Skip the contractor markup and save thousands by installing this system yourself! The MRCOOL DIY 5th Gen’s pre-charged Quick-Connect® line sets make it possible for most homeowners to complete their installation in a weekend — no refrigerant handling, vacuum pump, or pro labor required. It’s the perfect combination of innovation, affordability, and independence.

Technical Specifications

  • Brand: MRCOOL
  • Series: DIY 5th Gen Multi-Zone Mini-Split
  • Model: DIY-MULTI6-55HP230D-O
  • Cooling Capacity: 47,000 BTU
  • Heating Capacity: 55,000 BTU
  • Zones: 6
  • Refrigerant: R-454B (Pre-Charged Quick-Connect®)
  • Efficiency: 21.5 SEER2 | EER2 12 | HSPF2-4 10.6
  • Voltage: 208/230V, 1 Phase, 60 Hz
  • Compressor: DC Inverter Rotary
  • Operating Range: Heat down to −13°F | Cool up to 122°F
  • Noise Level: 64 dBA (Outdoor Unit)
  • Max Line Set Length: 221.4 ft combined
  • Certifications: Energy Star, AHRI, ETL, UL
  • Warranty: 5-Year Parts | 7-Year Compressor | Lifetime (MRCOOL Care Registration)
Nationwide Shipping from this retailer: Fast delivery anywhere in the U.S. — systems ship factory-direct, fully warrantied, and ready for installation. Enjoy secure freight delivery and real-time tracking from our warehouse to your door.

 

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Shipping Policy

Free Standard Shipping

We offer free standard shipping on all orders. Orders are processed within 1–2 business days and typically arrive within 5–7 business days.

Expedited Shipping

Expedited shipping options are available at checkout. Expedited orders placed before 12pm EST ship the same business day.

Order Tracking

Once your order ships you will receive a confirmation email with a tracking number. You can track your shipment at any time through our website or the carrier's portal.

International Shipping

We currently ship within the United States only. International shipping is not available at this time.

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.

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