MRCOOL DIY 5th Gen Mini Split - 5-Zone 55,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 18K + 12K + 9K + 9K + 6K Ceiling Cassette Air Handlers

MRCOOL DIY 5th Gen Mini Split - 5-Zone 55,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 18K + 12K + 9K + 9K + 6K Ceiling Cassette Air Handlers

Take control of your home’s comfort with the MRCOOL® 5th Gen DIY® Multi-Zone Mini Split System — the ultimate solution for efficient, customizable, and true DIY-friendly heating and cooling.

This powerful 55K 5-Zone system includes one 18K, one 12K, two 9K and one 6K ceiling cassette air handlers.

Features

• Customize mini-split system: choose the perfect line set length for each zone just above the “Add to Cart” button.
• Ultra-Efficient Cooling & Heating: Enjoy up to 22 SEER2 and 10.6 HSPF2-4 for energy-efficient year-round comfort.
• Low-Profile Ceiling Cassette Design: Flush-mounted unit fits between standard ceiling joists for a clean, built-in look.
• DIY-Friendly QuickConnect® Installation: No vacuuming or professional tools needed — pre-charged line sets make setup fast and simple.
• Smart Voice & App Control: Full control via SmartHVAC app, Alexa, Google Assistant, or included wireless remote.
• Eco-Conscious Refrigerant: Uses R-454B refrigerant with a low environmental impact.
• Industry-Leading Warranty: Includes 5-year parts, 7-year compressor, and lifetime replacement with MRCOOL® Care registration.

What our Experts Think

• Powerful Multi-Zone Climate Control

  • 55,000 BTU capacity split across 5 zones for precise heating and cooling.

  • Ideal for customizing comfort in different rooms or spaces.

• DIY Installation Made Simple

  • Designed for easy, professional-quality self-installation.

  • Saves on labor costs and speeds up setup.

• Efficient Ceiling Cassette Air Handlers

  • Five ceiling cassette units (18K, 12K, 9K, 9K, 6K BTU) deliver balanced airflow.

  • Space-saving design fits seamlessly into any room.

• Year-Round Heat Pump Functionality

  • Provides efficient heating and cooling with strong energy performance.

  • Quiet operation ensures comfort without noise distractions.

• Smart Features for Modern Living

  • Compatible with Wi-Fi controls for easy remote management.

  • Enhances convenience and energy savings.

Q&A

Q: What is the MRCOOL DIY 5th Gen Mini Split system?
A: A 5-zone, 55,000 BTU ductless air conditioner and heat pump with ceiling cassette air handlers for efficient heating and cooling.

Q: How are the zones configured?
A: Five zones with air handlers sized 18K, 12K, 9K, 9K, and 6K BTU for customizable climate control.

Q: Is it suitable for DIY installation?
A: Yes, designed for easy do-it-yourself setup with no specialized HVAC tools needed.

Q: Does it provide heating and cooling?
A: Yes, the heat pump offers both heating and cooling for year-round comfort.

Q: What are the energy-saving features?
A: Zoned control and high SEER ratings maximize efficiency and reduce energy costs.

Q: Where is this system ideal to use?
A: Perfect for multi-room homes, small offices, and spaces needing flexible climate zones.

Q: Are ceiling cassette air handlers included?
A: Yes, five ceiling cassette units come with the system for discreet, space-saving installation.

Maintenance Tips

• Clean or replace air filters every 1-3 months.

• Keep outdoor condenser free from dirt, leaves, and debris.

• Schedule yearly professional checkups for refrigerant levels and system health.

• Regularly clear condensate drain lines to prevent blockages.

• Ensure unobstructed airflow around indoor ceiling cassette units.

• Avoid covering or blocking air handlers for optimal performance.

• Run the system periodically to maintain efficiency and prevent issues.