MRCOOL DIY 5th Gen Mini Split - 5-Zone 55,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 12K + 12K + 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 three 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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Versatile 5-Zone System: Delivers customized cooling and heating with 12K + 12K + 12K + 9K + 6K ceiling cassette handlers.
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Powerful 55,000 BTU Capacity: Efficiently manages large spaces while optimizing energy use.
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User-Friendly DIY Installation: 5th Gen design makes setup straightforward, cutting installation costs.
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Quiet & Sleek Ceiling Cassette Units: Low-noise operation blends seamlessly into any room design.
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Smart Connectivity: Compatible with Wi-Fi for remote control and smart home integration.
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Reliable Heat Pump Technology: Provides year-round comfort with energy-saving heating and cooling.
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Built to Last: Durable components backed by solid manufacturer warranties.
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 (12K, 12K, 12K, 9K, 6K BTU) for efficient multi-room climate control.
Q: Can I install this system myself?
A: Yes, it features a DIY design with pre-charged linesets for easy, professional-quality installation without needing an HVAC technician.
Q: How does the system perform for heating and cooling?
A: It delivers reliable heating and cooling across five zones with energy-efficient inverter technology for year-round comfort.
Q: What are the benefits of ceiling cassette air handlers?
A: They provide discreet ceiling installation, even air distribution, and quiet operation.
Q: Can I control each zone separately?
A: Yes, each zone has its own remote control for personalized temperature settings.
Q: Is this system energy efficient?
A: Yes, it optimizes energy use by conditioning only occupied spaces using advanced inverter technology.
Maintenance Tips
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Clean or replace air filters every 1-3 months.
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Keep outdoor condenser coils free from dirt and debris.
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Schedule annual professional check-ups for refrigerant and system performance.
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Regularly clean ceiling cassette air handlers to ensure optimal airflow.
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Keep vents and airflow paths unobstructed.
Damage 
Loss 
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