MRCOOL DIY 5th Gen Mini Split - 6-Zone 55,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 18K + 12K + 12K + 12K + 9K + 9K Ceiling Cassette Air Handlers - DIY5-6ZC-55HP-18K12K12K12K9K9K
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 6-Zone system includes one 18K, three 12K and two 9K ceiling cassette air handlers.
Features
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Customize mini-split system: choose the perfect line set length for each zone just above the “Add to Cart” button.
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Ultra-Efficient Cooling & Heating: Enjoy up to 22 SEER2 and 10.6 HSPF2-4 for energy-efficient year-round comfort.
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Low-Profile Ceiling Cassette Design: Flush-mounted unit fits between standard ceiling joists for a clean, built-in look.
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DIY-Friendly QuickConnect® Installation: No vacuuming or professional tools needed — pre-charged line sets make setup fast and simple.
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Smart Voice & App Control: Full control via SmartHVAC app, Alexa, Google Assistant, or included wireless remote.
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Eco-Conscious Refrigerant: Uses R-454B refrigerant with a low environmental impact.
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Industry-Leading Warranty: Includes 5-year parts, 7-year compressor, and lifetime replacement with MRCOOL® Care registration.
What our Experts Think
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Powerful Multi-Zone Cooling & Heating: 55,000 BTU total capacity with six-zone control—perfect for whole-home comfort.
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DIY-Friendly Installation: Designed for easy setup without professional help, saving time and cost.
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Flexible Air Handlers: Includes ceiling cassette units (18K, 12K, 12K, 12K, 9K, 9K BTU) for discreet, efficient air distribution.
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High Efficiency: Advanced inverter technology ensures energy savings and quiet operation.
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Smart Control Ready: Compatible with Wi-Fi controls for remote temperature management.
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Space-Saving Design: Ideal for homes without ductwork or those seeking zoning flexibility.
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Reliable & Durable: Built to last with quality components and MRCOOL’s trusted support.
Q&A
Q: What spaces is the MRCOOL DIY 6-Zone Mini Split system ideal for?
A: Perfect for multi-room homes or offices up to 3,000 sq. ft. needing customizable climate control.
Q: What zones and capacities are included?
A: Includes six ceiling cassette air handlers with capacities of 18K, 12K (×3), and 9K (×2) BTU.
Q: Does this system provide heating and cooling?
A: Yes, it functions as both an air conditioner and heat pump for year-round comfort.
Q: Is the MRCOOL DIY Mini Split easy to install?
A: Yes, designed for DIY installation with no specialized tools or refrigerant handling needed.
Maintenance Tips
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Clean or replace air filters in each indoor unit every 30–60 days
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Inspect and clear condensate drain lines monthly to avoid clogs
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Clean indoor unit coils and fan blades yearly for optimal airflow
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Keep outdoor condenser unit free of debris with at least 2–3 feet clearance
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Schedule annual professional servicing to check refrigerant levels and system performance
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Ensure ceiling cassette vents remain unobstructed for balanced airflow
