MRCOOL DIY 5th Gen Mini Split - 4-Zone 36,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 18K + 12K + 9K + 9K Wall Mount Air Handlers - DIY5-4Z-36HP-18K12K9K9K
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 36K BTU 4-Zone system includes four 12K wall mounted 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 23 and 9.9 HSPF2-4 for energy-efficient year-round comfort.
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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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Powerful 4-Zone Heating & Cooling: 36,000 BTU system with 18K, 12K, and two 9K handlers for tailored comfort across varied room sizes.
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Simple DIY Installation: Pre-charged Quick Connect lines make setup quick and easy—no professional required.
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Efficient Zoned Control: Independent temperature settings optimize comfort and lower energy use.
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Smart Connectivity: Compatible with MRCOOL app, Alexa, and Google Assistant for convenient remote operation.
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Quiet & Energy Saving: Advanced inverter tech delivers high SEER efficiency with whisper-quiet performance.
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Reliable Year-Round Comfort: Heat pump ensures effective heating and cooling in all seasons, supported by a strong warranty.
Q&A
Q: What is the MRCOOL DIY 5th Gen 4-Zone Mini Split?
A: A 36,000 BTU ductless heat pump and air conditioner with 18K + 12K + 9K + 9K wall-mounted air handlers for efficient multi-zone heating and cooling.
Q: Is this system easy to install?
A: Yes. It features pre-charged Quick Connect lines for simple DIY installation—no professional tools needed.
Q: Does it provide both heating and cooling?
A: Yes. It offers reliable heating in winter and efficient cooling in summer for year-round comfort.
Q: How energy efficient is the system?
A: Built with inverter technology and high SEER2 ratings, it delivers quiet, energy-saving performance.
Q: Are there smart controls?
A: Yes. Built-in Wi-Fi enables control through the MRCOOL app, Alexa, or Google Assistant for easy zone management.
Q: What’s included?
A: One 36K BTU outdoor condenser, four indoor air handlers (18K + 12K + 9K + 9K), pre-charged line sets, communication cables, and mounting accessories.
Q: Who is this system best for?
A: Ideal for homes or offices requiring customizable, energy-efficient temperature control across four zones.
Maintenance Tips
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Clean Filters Monthly: Wash indoor filters to maintain airflow and efficiency.
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Clear Outdoor Unit: Remove dirt and debris for optimal heat exchange.
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Flush Drain Lines: Regularly clear condensate drains to prevent clogs and leaks.
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Check Connections: Ensure refrigerant and electrical fittings are secure and free from corrosion.
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Seasonal Tune-Up: Test system before peak seasons to ensure smooth operation.
