MRCOOL DIY 5th Gen Mini Split - 6-Zone 55,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 12K + 12K + 12K + 12K + 6K + 6K Ceiling Cassette Air Handlers - DIY5-6ZC-55HP-12K12K12K12K6K6K
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 four 12K and two 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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Full-Home Coverage – 55,000 BTU condenser powers up to 6 zones, delivering precise heating and cooling across multiple rooms.
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DIY-Friendly Install – Pre-charged No-Vac line sets make installation straightforward with no special tools required.
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Balanced Zone Setup – Includes four 12K and two 6K ceiling cassettes, ideal for medium and smaller rooms needing even comfort.
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High Efficiency – Inverter technology ensures quieter operation, reliable performance, and lower energy bills.
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Year-Round Comfort – Heat pump system provides efficient cooling in summer and dependable heating in winter.
Q&A
Q: What’s included in this system?
A: A 55,000 BTU DIY mini split condenser paired with six ceiling cassette air handlers: four at 12K BTU and two at 6K BTU.
Q: What makes it DIY-friendly?
A: The system uses pre-charged R-410A No-Vac Quick Connect lines, so installation requires no vacuum pumps or special tools.
Q: Can it provide both cooling and heating?
A: Yes, it’s a heat pump system that efficiently delivers comfort in all seasons.
Q: What spaces is this best for?
A: Perfect for homes or offices needing coverage for four medium rooms (12K units) and two smaller rooms (6K units).
Q: Why choose ceiling cassette air handlers?
A: They mount flush with the ceiling, save wall space, and distribute 360° airflow for even comfort.
Q: Is it energy efficient?
A: Yes, with inverter technology for high SEER ratings, reduced energy costs, and quiet operation.
Maintenance Tips
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Clean or replace ceiling cassette filters every 1–3 months.
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Wipe cassette panels and keep vents free of dust.
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Inspect outdoor condenser coils and remove dirt or debris.
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Check refrigerant lines and insulation for wear or leaks.
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Schedule yearly professional maintenance to ensure long-term multi-zone efficiency and performance.
