MRCOOL DIY 5th Gen Mini Split - 5-Zone 55,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 18K + 18K + 9K + 9K + 9K 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 5-Zone system includes two 18K and three 9K 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 5-Zone Layout — The 55,000 BTU condenser paired with ceiling cassette handlers (18K + 18K + 9K + 9K + 9K) delivers balanced climate control across rooms of varying sizes.
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DIY-Friendly Design — Pre-charged linesets and plug-and-play setup reduce complexity and installation costs compared to traditional systems.
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Latest Efficiency Standards — As part of the 5th Gen DIY line, this unit is designed with improved SEER2/HSPF2 ratings for energy savings.
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Discrete Aesthetics & Comfort — Ceiling cassette handlers provide even airflow while remaining unobtrusive in interior spaces.
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Smart Load Management — The system dynamically allocates capacity among zones to match demand and minimize energy waste.
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Best For — Homeowners or light commercial spaces needing a flexible, high-efficiency multi-room solution without extensive ductwork.
Q&A
Q: What is the MRCOOL DIY 5th Gen 5-Zone Mini Split System?
A: A 55,000 BTU ductless air conditioner and heat pump with five ceiling cassette air handlers for efficient, whole-home comfort.
Q: What sizes are included?
A: Two 18K BTU and three 9K BTU ceiling cassette air handlers for flexible zone control.
Q: Does it need professional installation?
A: No, the DIY system is designed for quick, easy installation without specialized tools or HVAC experience.
Q: What are the key advantages?
A: High energy efficiency, quiet operation, smart controls, and independent temperature management for each zone.
Q: Who is this system ideal for?
A: Homeowners seeking a powerful, customizable, and easy-to-install multi-zone heating and cooling solution.
Maintenance Tips
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Clean or replace air filters every 4–6 weeks to maintain airflow and efficiency.
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Wipe indoor units and ceiling cassettes regularly to remove dust.
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Keep the outdoor condenser clear of debris and blockages.
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Inspect refrigerant lines and fittings annually for leaks.
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Schedule professional servicing once a year for optimal performance.
