MRCOOL DIY 5th Gen Mini Split - 6-Zone 48,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 18K + 12K + 6K + 6K + 6K + 6K Ceiling Cassette Air Handlers
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 48K 6-Zone system includes one 18K, one 12K and four 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 21.8 SEER2 and 10 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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Strategic Zone Coverage – One 18K cassette for the largest room, one 12K for a medium space, and four 6K units for smaller bedrooms, offices, or dens.
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Energy-Efficient Operation – DC inverter technology provides quiet, precise, and cost-effective heating and cooling year-round.
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DIY-Friendly Installation – Pre-charged No-Vac line sets simplify setup without professional HVAC tools.
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Year-Round Comfort – Heat pump system ensures reliable cooling in summer and heating in winter.
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Discreet Ceiling Cassettes – Even airflow distribution saves wall and floor space while keeping rooms comfortable.
Q&A
Q: What’s included in this system?
A: A 48,000 BTU DIY heat pump condenser paired with six ceiling cassette air handlers: one at 18K BTU, one at 12K BTU, and four at 6K BTU.
Q: Is this system DIY-friendly?
A: Yes. It uses pre-charged R-410A No-Vac Quick Connect lines, allowing easy installation without vacuum pumps or professional refrigerant handling.
Q: Can it both heat and cool?
A: Yes, this ductless heat pump system provides efficient year-round comfort.
Q: What type of spaces is this configuration best for?
A: Ideal for one large room (18K), one medium room (12K), and four smaller rooms (6K each), all with independent zone control.
Q: Why choose ceiling cassette air handlers?
A: They install flush with the ceiling, save wall space, and provide 360° airflow for consistent comfort throughout each zone.
Q: How energy efficient is it?
A: With inverter technology, the system delivers high SEER2 efficiency, low noise, and reduced energy bills.
Q: Who should choose this setup?
A: Perfect for homeowners or offices needing zoned comfort across mixed room sizes, with DIY installation convenience.
Maintenance Tips
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Clean or replace ceiling cassette filters every 1–3 months.
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Keep cassette panels and vents free of dust for optimal airflow.
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Inspect and clean outdoor condenser coils regularly.
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Check refrigerant lines, insulation, and connections for wear or leaks.
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Schedule annual professional service to maintain reliable multi-zone efficiency and performance.
