MRCOOL DIY 5th Gen Mini Split - 4-Zone 36,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 12K + 9K + 9K + 9K Wall Mount Air Handlers - DIY5-4Z-36HP-12K9K9K9K
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 one 12K and three 9K 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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Efficient 4-Zone Cooling & Heating: 36,000 BTU system with one 12K and three 9K handlers, ideal for balanced comfort across multiple rooms.
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DIY Installation Made Easy: Pre-charged Quick Connect lines ensure fast, tool-free setup—no technician required.
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Individual Zone Control: Customize temperatures per room to maximize comfort and reduce energy use.
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Smart Home Ready: Works seamlessly with MRCOOL app, Alexa, and Google Assistant for convenient remote management.
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Quiet & Energy Efficient: Inverter technology delivers high SEER performance with minimal noise.
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Reliable All-Season Comfort: Heat pump capability ensures efficient heating and cooling year-round, backed by MRCOOL’s 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 system with 12K + 9K + 9K + 9K wall-mounted air handlers for flexible multi-zone comfort.
Q: Is it easy to install?
A: Yes. The system features pre-charged Quick Connect lines for simple DIY installation without professional tools.
Q: Does it provide heating and cooling?
A: Yes. It delivers efficient cooling in summer and reliable heating in winter.
Q: How energy efficient is it?
A: Equipped with inverter technology and high SEER2 ratings, it offers quiet operation and energy savings.
Q: What smart controls does it have?
A: Built-in Wi-Fi lets you manage temperature and schedules via the MRCOOL app, Alexa, or Google Assistant.
Q: What’s included in the package?
A: One 36K BTU outdoor condenser, four indoor air handlers (12K + 9K + 9K + 9K), pre-charged line sets, communication cables, and mounting accessories.
Q: Who is this system designed for?
A: Perfect for homes or offices needing customizable, energy-efficient temperature control across four zones.
Maintenance Tips
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Clean Filters Monthly: Wash indoor filters to ensure strong airflow and energy savings.
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Clear Outdoor Unit: Remove leaves and debris to maintain effective 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 connections are secure and corrosion-free.
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Seasonal Tune-Up: Test the system before heavy use seasons for optimal performance.
