Take full control of comfort in every room with the MRCOOL DIY 5th Gen 36 K BTU 5-Zone Ductless Mini Split System with Ceiling Cassettes (6 K + 9 K + 9 K + 9 K + 9 K).
Designed for homeowners who want professional-grade HVAC without hiring a contractor, this system delivers quiet, efficient heating and cooling across five zones — all with simple DIY installation.
The system includes:
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One 6 K BTU cassette (~250 sq ft)
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Four 9 K BTU cassettes (~375 sq ft each)
All powered by a 36 K BTU 23 SEER2 condenser engineered for reliable comfort throughout the year.
⚙️ Key Features
✅ DIY Installation — No Vacuum Pump Required
Patented Quick Connect® Line Sets come pre-charged with eco-friendly R-454B refrigerant, so you can install confidently without special tools or HVAC experience.
🌡️ Smart Comfort Control
Use the MRCOOL SmartHVAC App or voice assistants like Amazon Alexa and Google Home to manage each zone, set schedules, and monitor performance.
💨 Low-Profile Ceiling Cassette Design
Recessed, discreet air handlers fit between standard 16-inch joists, providing powerful airflow and whisper-quiet operation — ideal for both retrofits and new builds.
♻️ Energy Efficient & Eco-Safe
High-efficiency DC inverter technology and the new R-454B refrigerant reduce environmental impact while delivering lower operating costs.
🔒 Reliable Performance & Warranty
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7-Year Compressor Warranty
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5-Year Parts Warranty
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Optional Lifetime Coverage via the MRCOOL Care Program
Gold Fin® coating protects the condenser from corrosion and coastal wear.
💡 Why Choose MRCOOL DIY 5th Gen Ceiling Cassettes
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Heat & cool up to 1,500 sq ft across five zones
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Compatible with both ceiling and wall air handlers
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Auto, Sleep, Dehumidify modes for precision comfort
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Wi-Fi and app integration for real-time control
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Quiet mode and filter reminders for easy maintenance
📦 What’s Included
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(1) 36 K BTU MRCOOL DIY 5th Gen Condenser
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(1) 6 K BTU Ceiling Cassette
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(4) 9 K BTU Ceiling Cassettes
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Pre-charged DIY Quick Connect Line Sets & Couplers
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Remote Controls & Installation Manuals
⚡ Technical Specifications
| Specification | Value |
|---|---|
| Cooling Capacity | 34 000 BTU |
| Heating Capacity | 36 000 BTU |
| Voltage | 208/230 V Single Phase |
| Refrigerant | R-454B (Eco-Safe) |
| SEER2 / HSPF2-4 | 23 / 9.9 |
| Zones Supported | 5 Indoor Units |
| Compressor Type | DC Inverter Rotary |
| Noise Level | 64 dBA (Max) |
| Connectivity | Wi-Fi, SmartHVAC App, Alexa, Google Home |
| Certifications | ETL, AHRI, Energy Star Certified |
🌬️ Performance & Comfort Features
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Multi-room zoning for balanced climate control
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Auto mode adjusts cooling/heating as needed
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Dehumidify mode for humid seasons
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Sleep mode for energy savings overnight
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Quiet operation and filter alerts for low maintenance
💬 Customer Benefits
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Install it yourself and save thousands on labor
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0 % financing available through Affirm
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Free shipping on all orders
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Lifetime technical support from MRCOOL
🏁 The DIY Comfort Solution
The MRCOOL DIY 5th Gen 36 K BTU 5-Zone Mini Split with Ceiling Cassettes (6 K + 9 K + 9 K + 9 K + 9 K) delivers unmatched flexibility, efficiency, and style.
Enjoy reliable comfort throughout the year, smart control, and easy installation — without the contractor markup.
Your comfort, your way — powered by this retailer.
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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Outdoor esthetics do matter.
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Create your bundle with ease.
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Authorized Dealer of Mr Cool™.
