MRCOOL DIY 5th Gen Mini Split - 6-Zone 55,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 9K + 9K + 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 55K 6-Zone system includes three 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 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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Tailored Small-to-Mid Room Comfort – Three 9K cassettes are well-suited for medium rooms like living rooms, offices, or larger bedrooms, while three 6K units efficiently cover smaller bedrooms, studies, or compact spaces.
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Efficient Zoning – This mix avoids oversizing, ensuring each room gets just the right capacity for consistent comfort and reduced energy waste.
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DIY Installation – Includes MRCOOL’s pre-charged No-Vac line sets for simplified homeowner installation—no refrigerant handling required.
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Year-Round Climate Control – Provides both heating and cooling with inverter-driven technology for smooth, efficient operation.
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Quiet & Discreet – Ceiling cassettes distribute airflow evenly without taking up wall or floor space, perfect for a clean aesthetic.
Q&A
Q: What’s included in this system?
A: A 55,000 BTU DIY mini split condenser with six ceiling cassette air handlers: three at 9K BTU and three at 6K BTU.
Q: Is it easy to install?
A: Yes. It comes with pre-charged R-410A No-Vac Quick Connect lines, so no special tools or professional refrigerant handling are needed.
Q: Can it both cool and heat?
A: Absolutely. This is a heat pump system, delivering efficient cooling in hot months and heating in cold months.
Q: What spaces does this configuration suit best?
A: Perfect for small to medium-sized rooms, such as bedrooms, offices, or dens, with individual zone control for maximum comfort.
Q: Why choose ceiling cassette air handlers?
A: They fit flush into the ceiling, saving wall space and providing 360° airflow for even distribution.
Q: How energy efficient is it?
A: With inverter technology, the system provides high SEER efficiency, quieter operation, and lower energy bills.
Q: Who should choose this setup?
A: Best for those who need zoned comfort across several small-to-medium rooms, with a simple DIY 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 dust-free for smooth airflow.
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Inspect outdoor condenser coils and clear away debris.
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Check refrigerant lines, insulation, and connections regularly.
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Schedule annual professional maintenance to sustain reliable multi-zone efficiency and performance.
