MRCOOL DIY 5th Gen Mini Split - 6-Zone 55,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 18K + 12K + 12K + 12K + 9K + 6K Ceiling Cassette Air Handlers - DIY5-6ZC-55HP-18K12K12K12K9K6K
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, one 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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Whole-Home Zoning Power – 55,000 BTU condenser supports up to 6 zones, delivering personalized heating and cooling throughout the home.
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DIY-Friendly Installation – Pre-charged No-Vac line sets simplify setup with no special tools required.
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Smart Zone Balance – Comes with one 18K, three 12K, one 9K, and one 6K ceiling cassette—perfect mix for large, medium, and small rooms.
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Energy-Efficient Comfort – Advanced inverter technology ensures quieter operation and reduced energy costs.
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Year-Round Performance – Heat pump 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 ductless mini split condenser with six ceiling cassette air handlers: one 18K BTU, three 12K BTU, one 9K BTU, and one 6K BTU.
Q: What makes it DIY-friendly?
A: The system uses pre-charged R-410A No-Vac Quick Connect lines, making installation possible without special tools or professional refrigerant handling.
Q: Does it provide both heating and cooling?
A: Yes, it’s a ductless heat pump system, offering efficient year-round comfort.
Q: What spaces does this setup cover?
A: It’s designed to manage six independent zones, from larger living areas (18K BTU) to small rooms (6K BTU), making it ideal for varied space sizes.
Q: Why choose ceiling cassette air handlers?
A: They install flush to the ceiling, save wall space, and deliver 360° airflow for balanced comfort.
Q: Is it energy efficient?
A: Yes, inverter technology ensures high SEER performance, quiet operation, and lower energy costs.
Q: Who should choose this system?
A: Perfect for homes, offices, or light commercial spaces needing zoned comfort with different room sizes and a DIY installation option.
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 free of dust.
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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 annual professional maintenance to ensure reliable multi-zone performance and efficiency.
