Enjoy total home comfort and professional-grade performance with the MRCOOL DIY 5th Gen 36 K BTU 5-Zone Ductless Mini Split System with Ceiling Cassettes. Designed for true do-it-yourself installation, this multi-zone system delivers quiet, efficient heating and cooling for up to five rooms — without the need for ductwork or special tools.
This configuration includes:
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One 6 K BTU cassette – ideal for ~250 sq ft
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Three 9 K BTU cassettes – ideal for ~350–400 sq ft each
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One 18 K BTU cassette – ideal for ~700–800 sq ft
All powered by a 36 K BTU 23 SEER2 inverter condenser for unmatched energy savings and reliability.
⚙️ Key Features
✅ Easy DIY Installation
Skip the HVAC crew. Every line set comes pre-charged with eco-friendly R-454B refrigerant, and the patented Quick Connect® fittings make installation fast, leak-free, and safe — no vacuum pump required.
🌡️ Smart Climate Control
Adjust temperatures, set schedules, and monitor performance right from the MRCOOL SmartHVAC App, or use Amazon Alexa and Google Home voice commands for touch-free control.
💨 Slim Ceiling Cassette Design
Low-profile indoor cassettes sit discreetly between standard 16-inch joists — perfect for retrofits or new construction. Directional airflow and whisper-quiet operation keep every room perfectly balanced and comfortable.
♻️ Energy Efficient & Eco-Friendly
Advanced DC inverter technology and R-454B refrigerant deliver high SEER2 performance with lower environmental impact. Enjoy comfort while reducing your carbon footprint and energy bills.
🛠️ Built for Reliability
Includes 7-Year Compressor Warranty, 5-Year Parts Warranty, and optional Limited Lifetime Replacement Coverage through the MRCOOL Care Program. Gold Fin® condenser coating prevents corrosion for years of dependable performance.
💡 Why Choose MRCOOL DIY Multi-Zone
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Heat or cool up to 1,500 sq ft across five zones
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Auto, Sleep, and Dehumidify modes for personalized comfort
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Wi-Fi and app integration with real-time diagnostics
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Quiet mode and filter reminder functions for low maintenance
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Compatible with both ceiling cassettes and wall-mounted air handlers
📦 What’s Included
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(1) 36 K BTU MRCOOL DIY 5th Gen Multi-Zone Condenser
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(1) 6 K BTU Ceiling Cassette Air Handler
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(3) 9 K BTU Ceiling Cassette Air Handlers
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(1) 18 K BTU Ceiling Cassette Air Handler
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Pre-charged DIY Quick Connect line sets and couplers
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Installation manuals and remote controllers
⚡ Technical Highlights
| 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 |
| Max Zone Capacity | 5 Indoor Units |
| Compressor Type | DC Inverter Rotary |
| Noise Level | 64 dBA (Max) |
| Connectivity | Wi-Fi, Alexa, Google Home, SmartHVAC App |
| Certifications | ETL, AHRI, Energy Star Certified |
💬 Customer Benefits
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No professional installation needed — save thousands
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Instant zoning comfort for every room
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Free shipping + 0 % Affirm financing available
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Backed by MRCOOL’s lifetime technical support
📘 Warranty & Support
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7 Year Compressor Warranty
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5 Year Parts Warranty
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Limited Lifetime Replacement (with MRCOOL Care Program)
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U.S. Technical Support and Easy-Access Service Guides
🏁 The DIY Comfort Advantage
The MRCOOL DIY 5th Gen 36 K BTU 5-Zone System offers professional results with homeowner convenience.
From its quiet ceiling cassette design to its smart automation and eco-friendly refrigerant, it’s built for comfort, control, and confidence — all without hiring a pro.
DIY your way to reliable comfort throughout the year — fast setup, smart control, and powerful performance from 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™.
