MRCOOL DIY 5th Gen Mini Split - 6-Zone 55,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 18K + 12K + 12K + 9K + 6K + 6K Ceiling Cassette Air Handlers - DIY5-6ZC-55HP-18K12K12K9K6K6K
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 18K, two 12K, one 9K and two 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.
What our Experts Think
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High-Capacity Comfort – 55,000 BTU system with 18K, 12K, 9K, and 6K cassettes delivers tailored heating and cooling for a variety of room sizes.
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DIY Installation Ready – Pre-charged No-Vac line sets allow quick, tool-free setup without professional help.
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Discreet Ceiling Design – Cassette air handlers sit flush in the ceiling for even airflow and a clean, modern look.
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Efficient Year-Round Use – Inverter-driven heat pump provides reliable cooling in summer and efficient heating in winter.
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Zone-by-Zone Control – Each cassette runs independently, giving homeowners precise comfort management and energy savings across all six zones.
Q&A
Q: Can each room have its own temperature control?
A: Yes. Every cassette operates independently with its own thermostat for true zoning.
Q: Does it work for both heating and cooling?
A: Yes — this is a heat pump system, providing efficient cooling in summer and heating in winter.
Q: Why choose MRCOOL DIY?
A: It’s the only true DIY multi-zone mini split with pre-charged No-Vac line sets, eliminating the need for specialized tools or professional installation.
Q: Who is this bundle ideal for?
A: Homes needing a mix of one large living zone, several medium rooms, and smaller spaces, making it versatile for families with diverse comfort needs.
Maintenance Tips
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Clean or replace filters in each ceiling cassette every 1–2 months to maintain airflow.
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Wipe cassette panels and vents to reduce dust buildup.
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Inspect condensate drain lines across all zones to prevent clogs and leaks.
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Check pre-charged line set connections for tight, leak-free performance.
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Keep the outdoor condenser clear of debris, leaves, and obstructions.
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Test remote and smart control functions for all six zones.
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Schedule annual professional maintenance to optimize efficiency and extend lifespan.
