MRCOOL DIY 5th Gen Mini Split - 6-Zone 55,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 12K + 12K + 12K + 6K + 6K + 6K Ceiling Cassette Air Handlers - DIY5-6ZC-55HP-12K12K12K6K6K6K
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 three 12K and three 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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Powerful Multi-Zone Comfort – 55,000 BTU condenser supports 6 ceiling cassette air handlers for whole-home coverage.
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DIY-Friendly Setup – Pre-charged No-Vac line sets make installation easy without specialized tools or costly professional labor.
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Optimized Room Coverage – Three 12K units handle medium spaces, while three 6K units are perfect for smaller rooms or offices.
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Energy Efficiency – Inverter technology delivers quiet performance, lower energy bills, and consistent temperature control.
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Year-Round Use – Works as both an air conditioner and a heat pump, ensuring comfort in every season.
Q&A
Q: What’s included in this system?
A: A 55,000 BTU DIY ductless mini split condenser with six ceiling cassette air handlers: three at 12K BTU and three at 6K BTU.
Q: Is it really DIY-friendly?
A: Yes. Thanks to pre-charged R-410A No-Vac Quick Connect lines, it installs without vacuum pumps or special tools.
Q: Can it both heat and cool?
A: Absolutely. This heat pump system provides efficient year-round comfort.
Q: What type of spaces is this setup ideal for?
A: It’s perfect for a layout with three medium rooms (12K units) and three smaller rooms (6K units), balancing coverage for different space sizes.
Q: Why choose ceiling cassette air handlers?
A: They sit flush with the ceiling, free up wall space, and provide 360° airflow for consistent comfort.
Q: How efficient is it?
A: Built with inverter technology, it delivers high SEER efficiency, quieter operation, and reduced energy bills.
Q: Who should choose this system?
A: Best for homeowners or offices needing zoned comfort across a mix of medium and small rooms, with the convenience of DIY installation.
Maintenance Tips
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Clean or replace cassette air filters every 1–3 months.
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Keep ceiling cassette panels and vents dust-free.
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Inspect outdoor condenser coils and remove debris.
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Check refrigerant lines, insulation, and connections for wear.
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Schedule yearly professional service to ensure peak efficiency and reliable multi-zone performance.
