MRCOOL DIY 5th Gen Mini Split - 6-Zone 55,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 12K + 12K + 12K + 9K + 9K + 9K Ceiling Cassette Air Handlers - DIY5-6ZC-55HP-12K12K12K9K9K9K
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 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 Comfort – 55,000 BTU condenser supports up to 6 zones, delivering customized heating and cooling to every room.
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DIY Installation Ready – Pre-charged No-Vac line sets simplify setup without requiring professional tools.
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Balanced Zoning – Includes three 12K BTU and three 9K BTU ceiling cassettes, ideal for medium-to-small room applications.
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Year-Round Efficiency – Heat pump system provides reliable cooling in summer and energy-efficient heating in winter.
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Whisper-Quiet Operation – Inverter technology ensures smooth performance with lower energy costs.
Q&A
Q: What does this system include?
A: A 55,000 BTU DIY ductless mini split condenser paired with six ceiling cassette air handlers: three at 12K BTU and three at 9K BTU.
Q: What makes it DIY-friendly?
A: It features pre-charged R-410A No-Vac Quick Connect lines, so you don’t need special tools or professional installation for refrigerant handling.
Q: Can it both cool and heat?
A: Yes, it’s a heat pump system, delivering efficient cooling in summer and heating in winter.
Q: What spaces is it best for?
A: Designed for multi-room homes, offices, or commercial setups, offering independent comfort control in up to 6 zones.
Q: Why ceiling cassette air handlers?
A: They mount flush with the ceiling and provide 360° airflow, maximizing comfort while saving wall space.
Q: How efficient is it?
A: Built with inverter technology for higher SEER ratings, ensuring energy savings and quiet operation.
Q: Who should choose this system?
A: Ideal for those needing a powerful, customizable, and DIY-friendly multi-zone comfort solution without traditional ductwork.
Maintenance Tips
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Clean or replace cassette 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 clear away debris.
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Check refrigerant lines and insulation for wear.
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Schedule yearly professional service to ensure multi-zone performance and energy efficiency.
Damage 
Loss 
Theft 
