MRCOOL DIY 5th Gen Mini Split - 6-Zone 55,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 12K + 6K + 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 55K 6-Zone system includes one 12K and five 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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Optimized for Many Small Rooms – With five 6K cassettes, this setup excels at covering multiple compact spaces like bedrooms, offices, or dens without oversizing. The single 12K unit is ideal for a slightly larger room such as a master bedroom, dining area, or mid-sized living space.
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Balanced Load Distribution – This configuration avoids wasted capacity, making it energy-efficient while ensuring each zone gets tailored comfort.
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DIY-Friendly Install – MRCOOL’s 5th Gen system includes pre-charged No-Vac line sets, allowing homeowners to install without specialized HVAC tools.
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Year-Round Performance – Delivers both heating and cooling with inverter technology, maintaining stable temperatures and reducing energy costs.
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Discreet Comfort – Ceiling cassettes save wall and floor space while providing wide, even airflow distribution.
Q&A
Q: What’s included in this package?
A: A 55,000 BTU DIY heat pump condenser with six ceiling cassette air handlers: one at 12K BTU and five at 6K BTU.
Q: Is this system DIY-friendly?
A: Yes. It uses MRCOOL’s patented pre-charged R-410A No-Vac Quick Connect lines, meaning no special tools, brazing, or refrigerant handling are required.
Q: Does it provide both cooling and heating?
A: Correct. This is a ductless heat pump system, designed for year-round comfort.
Q: What room sizes does this fit best?
A: Ideal for multiple small rooms (6Ks) like bedrooms, offices, or dens, plus one medium-sized room (12K), all with independent zone control.
Q: Why ceiling cassette air handlers?
A: They’re installed flush in the ceiling, saving wall space and delivering 360° airflow for consistent comfort.
Q: How energy efficient is it?
A: Built with inverter compressor technology, ensuring high SEER efficiency, lower utility bills, and quieter operation.
Q: Who should choose this setup?
A: Perfect for homeowners wanting six individually controlled zones, mostly smaller rooms, with a DIY-friendly installation.
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 from 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 maintenance to ensure dependable multi-zone performance and efficiency.
