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:

• One 6 K BTU cassette – ideal for ~250 sq ft

• Three 9 K BTU cassettes – ideal for ~350–400 sq ft each

• 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.

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⚙️ 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.

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💡 Why Choose MRCOOL DIY Multi-Zone

• Heat or cool up to 1,500 sq ft across five zones

• Auto, Sleep, and Dehumidify modes for personalized comfort

• Wi-Fi and app integration with real-time diagnostics

• Quiet mode and filter reminder functions for low maintenance

• Compatible with both ceiling cassettes and wall-mounted air handlers

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📦 What’s Included

• (1) 36 K BTU MRCOOL DIY 5th Gen Multi-Zone Condenser

• (1) 6 K BTU Ceiling Cassette Air Handler

• (3) 9 K BTU Ceiling Cassette Air Handlers

• (1) 18 K BTU Ceiling Cassette Air Handler

• Pre-charged DIY Quick Connect line sets and couplers

• Installation manuals and remote controllers

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⚡ Technical Highlights

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💬 Customer Benefits

• No professional installation needed — save thousands

• Instant zoning comfort for every room

• Free shipping + 0 % Affirm financing available

• Backed by MRCOOL’s lifetime technical support

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📘 Warranty & Support

• 7 Year Compressor Warranty

• 5 Year Parts Warranty

• Limited Lifetime Replacement (with MRCOOL Care Program)

• U.S. Technical Support and Easy-Access Service Guides

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🏁 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 year-round comfort — fast setup, smart control, and powerful performance from MRCOOL DIY Direct.