MRCOOL DIY 5th Gen Mini Split - 5-Zone 55,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 18K + 18K + 12K + 9K + 6K Ceiling Cassette Air Handlers
Take control of your home’s comfort with the MRCOOL5th Gen DIYMulti-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, one 12K, one 9K and one 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 QuickConnectInstallation: 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 MRCOOLCare registration.
What our Experts Think
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Powerful multi-zone climate control: 55,000 BTU capacity with 5 zones ensures customized comfort for every room.
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Balanced air handlers: Two 18K, one 12K, one 9K, and one 6K ceiling cassette units deliver precise cooling and heating tailored to space size.
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User-friendly DIY installation: Pre-charged line sets and straightforward setup reduce labor and costs—ideal for homeowners.
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Efficient heat pump technology: Reliable heating in colder months and energy-saving cooling in summer.
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Quiet and discreet: Ceiling cassette design minimizes noise and maximizes room aesthetics.
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Trusted durability: MRCOOL’s warranty and support guarantee long-term peace of mind.
Q&A
Q: What is the MRCOOL DIY 5th Gen Mini Split?
A: A 5-zone, 55,000 BTU ductless air conditioner and heat pump system with ceiling cassette air handlers (18K + 18K + 12K + 9K + 6K).
Q: How many zones and capacities does it have?
A: Five zones with air handlers rated at 18,000, 18,000, 12,000, 9,000, and 6,000 BTU.
Q: Is it suitable for DIY installation?
A: Yes, designed for easy do-it-yourself setup without professionals.
Q: What are its key benefits?
A: Zoned comfort, energy efficiency, quiet operation, and both heating and cooling functions.
Q: Which spaces is it best for?
A: Multi-room homes needing personalized climate control with ceiling-mounted units.
Maintenance Tips
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Clean or replace air filters every 1-2 months for optimal airflow.
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Keep outdoor condenser clear of debris, leaves, and dirt.
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Ensure at least 2 feet clearance around the outdoor unit for proper ventilation.
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Wipe indoor ceiling cassette air handlers regularly to prevent dust buildup.
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Schedule annual professional maintenance for refrigerant check and system tune-up.
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Monitor system performance and promptly address unusual noises or drops in efficiency.
Damage 
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