MRCOOL DIY 5th Gen Mini Split - 6-Zone 55,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 12K + 9K + 9K + 9K + 9K + 6K Ceiling Cassette Air Handlers - DIY5-6ZC-55HP-12K9K9K9K9K6K
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 12K, four 9K and one 6K 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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Efficient Multi-Zone Cooling & Heating: 55,000 BTU total capacity with six ceiling cassette air handlers (one 12K, four 9K, one 6K) for customized comfort.
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DIY-Friendly Setup: Designed for easy installation without professional help, saving cost and hassle.
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Advanced Inverter Technology: Provides quiet, energy-efficient operation to reduce utility bills.
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Space-Saving Ceiling Cassettes: Sleek units integrate seamlessly into ceilings for discreet climate control.
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Smart Home Compatible: Wi-Fi enabled for remote control and scheduling via smartphone.
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Individual Zone Control: Tailor temperatures in each room for personalized comfort and energy savings.
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Reliable & Durable: Built with quality materials for lasting performance.
Q&A
Q: What size area does the MRCOOL DIY 6-Zone Mini Split system cover?
A: Ideal for multi-room spaces up to 3,000 sq. ft. with zoned heating and cooling.
Q: What are the air handler capacities included?
A: One 12,000 BTU, four 9,000 BTU, and one 6,000 BTU ceiling cassette units for customized comfort.
Q: Does this system provide both heating and cooling?
A: Yes, it operates as a heat pump and air conditioner for year-round climate control.
Q: Is this system suitable for DIY installation?
A: Yes, designed for easy DIY setup without requiring specialized tools or refrigerant handling.
Q: What energy-saving features does it offer?
A: Equipped with inverter technology for efficient operation and precise temperature management.
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 coils and fan blades annually 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 service to check refrigerant levels and system performance
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Ensure ceiling cassette vents remain unobstructed for balanced airflow
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Regularly inspect electrical components for safety and efficiency
