MRCOOL DIY 5th Gen Mini Split - 6-Zone 48,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 12K + 12K + 9K + 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 two 12K, one 9K 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 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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Versatile Multi-Zone Comfort – Two 12K cassettes for larger rooms, one 9K for a medium space, and three 6K cassettes for smaller bedrooms or offices.
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Energy-Efficient Inverter Operation – DC inverter technology delivers quiet, precise, and consistent temperature control while reducing energy costs.
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DIY Installation Ready – Pre-charged No-Vac line sets simplify installation with no need for professional HVAC tools.
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Year-Round Climate Control – Heat pump design provides reliable heating in winter and efficient cooling in summer.
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Ceiling Cassette Design – Discreet, wide airflow keeps rooms comfortable while saving wall and floor space.
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: two at 12K BTU, one at 9K BTU, and three at 6K BTU.
Q: Is it DIY-friendly?
A: Yes. It comes with pre-charged R-410A No-Vac Quick Connect lines, enabling installation without vacuum pumps or professional refrigerant handling.
Q: Can it both heat and cool?
A: Yes, this ductless heat pump system provides year-round comfort.
Q: What type of spaces does this setup suit best?
A: Ideal for two medium rooms (12K), one small-to-medium room (9K), and three compact rooms (6K), 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 even comfort distribution.
Q: How efficient is it?
A: With DC inverter technology, the system delivers high SEER2 efficiency, quiet operation, and lower energy bills.
Q: Who should choose this setup?
A: Best for homeowners or offices needing zoned comfort for mixed room sizes, with a DIY-friendly installation.
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.
