MRCOOL DIY 5th Gen Mini Split - 6-Zone 55,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 12K + 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 one 12K, two 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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Whole-Home Coverage – The 55,000 BTU condenser efficiently powers six ceiling cassette air handlers for distributed comfort.
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Balanced Zone Layout – One 12K for larger rooms, two 9Ks for mid-size spaces, and three 6Ks tailored for small rooms, offices, or bedrooms.
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DIY-Friendly – Pre-charged No-Vac line sets simplify installation, removing the need for professional refrigerant charging.
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Energy-Saving Performance – Inverter technology maintains steady temperatures with quiet operation and improved efficiency.
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All-Season Use – Provides both heating and cooling, making it a reliable comfort solution year-round.
Q&A
Q: What’s included in this system?
A: A 55,000 BTU DIY ductless mini split condenser paired with six ceiling cassette air handlers: one at 12K BTU, two at 9K BTU, and three at 6K BTU.
Q: Is it DIY-friendly?
A: Yes. It uses pre-charged R-410A No-Vac Quick Connect lines, making installation simple without vacuum pumps or special tools.
Q: Does it provide both heating and cooling?
A: Yes, this is a heat pump system that delivers efficient cooling in summer and heating in winter.
Q: What type of spaces does this cover?
A: Best for a home or office with one medium room (12K), two small-to-medium rooms (9K each), and three compact rooms (6K each).
Q: Why ceiling cassette air handlers?
A: They mount flush with the ceiling, free wall space, and provide 360° airflow for even comfort.
Q: How efficient is the system?
A: Built with inverter technology, it offers high SEER efficiency, energy savings, and quiet operation.
Q: Who is this system best for?
A: Ideal for those who need zoned comfort across different room sizes, from medium living spaces to small bedrooms or offices, while keeping installation DIY-friendly.
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 clear of dust.
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Inspect and clean outdoor condenser coils regularly.
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Check refrigerant lines, insulation, and connections for wear.
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Schedule annual professional service to maintain peak efficiency and dependable multi-zone operation.
