Customize comfort in every room with the MRCOOL DIY 5th Gen 36 K BTU 4-Zone Ductless Mini Split System with Ceiling Cassettes (6 K + 12 K + 12 K + 12 K).
Designed for easy, do-it-yourself installation, this system efficiently heats and cools four separate zones—no HVAC contractor required.
Zone coverage:
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1 × 6 K BTU cassette (~ 250 sq ft)
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3 × 12 K BTU cassettes (~ 500 sq ft each)
All powered by a 36 K BTU 23 SEER2 inverter condenser, giving you reliable, energy-smart comfort all year long.
⚙️ Key Features
✅ DIY Installation Made Easy
Pre-charged Quick Connect® Line Sets with eco-safe R-454B refrigerant eliminate vacuum pumps and specialized tools. Simply connect, tighten, and power up.
🌡️ Smart Climate Control
Monitor and manage your home from anywhere using the MRCOOL SmartHVAC App, or control hands-free with Alexa and Google Home.
💨 Discreet Ceiling Cassettes
Low-profile design fits between 16-inch joists for quiet, even airflow and a sleek, modern appearance.
♻️ Energy-Efficient and Eco-Friendly
Advanced DC inverter technology paired with R-454B refrigerant delivers exceptional efficiency while lowering environmental impact.
🔒 Durable and Protected
Backed by a 7-Year Compressor Warranty, 5-Year Parts Warranty, and optional Lifetime Coverage through MRCOOL Care. Gold Fin® coating prevents corrosion and extends system life.
💡 Why Homeowners Choose This System
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Perfect for homes up to ≈ 1,400 sq ft
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Quiet, discreet design for multi-room comfort
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Auto, Sleep & Dry modes for custom climate control
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Wi-Fi & voice integration for smart living
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Filter reminders and self-diagnostics 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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(3) 12 K BTU Ceiling Cassettes
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Pre-charged DIY Quick Connect Line Sets & Couplers
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Remotes & Installation Manuals
⚡ Technical Highlights
| Specification | Value |
|---|---|
| Cooling Capacity | 34 000 BTU |
| Heating Capacity | 36 000 BTU |
| Voltage | 208/230 V Single Phase |
| Refrigerant | R-454B |
| SEER2 / HSPF2-4 | 23 / 9.9 |
| Zones Supported | 4 |
| Compressor Type | DC Inverter Rotary |
| Noise Level | 64 dBA (Max) |
| Connectivity | Wi-Fi, Alexa, Google Home |
| Certifications | AHRI, ETL, Energy Star Certified |
💬 Customer Benefits
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DIY install saves thousands on HVAC labor
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Free shipping & 0 % Affirm financing
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Lifetime technical support from MRCOOL
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reliable comfort throughout the year with smart control
🏁 The DIY Comfort Solution
The MRCOOL DIY 5th Gen 36 K BTU 4-Zone Mini Split (6 K + 12 K + 12 K + 12 K) delivers powerful, efficient heating and cooling for four rooms with a straightforward, DIY-friendly setup.
Enjoy professional-grade comfort, energy savings, and modern smart features without hiring a contractor.
Simple to install. Smart to own. Only 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™.
