MRCOOL DIY 5th Gen Mini Split - 5-Zone 55,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 18K + 18K + 12K + 12K + 9K 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, two 12K and one 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 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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Optimized Multi-Zone Setup — 5-zone configuration (18K + 18K + 12K + 12K + 9K) paired with a 55,000 BTU condenser suits varied room loads and layout challenges.
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DIY Installation Friendly — Pre-charged lines and plug-and-play design reduce the need for specialized HVAC tools or contractors.
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High Efficiency Performance — Latest 5th Gen systems deliver strong SEER2/HSPF2 ratings, meaning lower energy bills and better climate control.
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Discreet Climate Control — Ceiling cassette air handlers distribute air evenly and remain unobtrusive within interior spaces.
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Adaptive Load Management — System intelligently balances output across zones to maintain comfort under different usage patterns.
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Best For — Homeowners or small commercial spaces needing a flexible, high-efficiency, multi-zone ductless solution without full 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 climate control.
Q: What sizes are included?
A: Two 18K BTU, two 12K BTU, and one 9K BTU ceiling cassette air handlers for flexible zoning.
Q: Does it require professional installation?
A: No, the DIY design allows for easy, tool-free installation without HVAC expertise.
Q: What are the main advantages?
A: High energy efficiency, quiet operation, smart controls, and customizable temperature control in each zone.
Q: Who is this system ideal for?
A: Homeowners seeking a powerful, versatile, 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 for efficient performance.
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Wipe ceiling cassettes and indoor units with a damp cloth to remove dust.
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Keep the outdoor condenser clear of debris and obstructions.
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Inspect refrigerant lines and fittings annually for leaks.
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Schedule professional maintenance yearly to ensure peak efficiency.
Damage 
Loss 
Theft 
