MRCOOL DIY 5th Gen Mini Split - 4-Zone 48,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 18K + 6K + 6K + 6K Wall Mount Air Handlers - DIY5-4Z-48HP-18K6K6K6K
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 48K BTU 4-Zone system includes one 24K, one 18K, one 9K and one 6K 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 21.8 and 10 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 Multi-Zone Comfort: The MRCOOL DIY 5th Gen 48,000 BTU system efficiently heats and cools up to four zones—ideal for larger homes or mixed-size spaces.
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DIY-Friendly Installation: Pre-charged Quick Connect linesets let you install without special tools or professional help—save time and money.
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Customized Climate Control: The 18K + 6K + 6K + 6K wall-mounted air handlers offer precise temperature management in every room, maximizing comfort and efficiency.
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Smart Home Integration: Wi-Fi enabled and compatible with the MRCOOL app, Alexa, and Google Assistant for effortless scheduling and remote control.
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Energy Efficient & Quiet: Advanced inverter technology delivers high SEER performance with whisper-quiet operation—perfect for both living and sleeping spaces.
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Reliable All-Season Performance: Dual heating and cooling capability ensures dependable comfort all year, backed by MRCOOL’s industry-leading warranty.
Q&A
Q: What is the MRCOOL DIY 5th Gen 4-Zone Mini Split?
A: It’s a 48,000 BTU ductless heat pump and air conditioner that heats and cools up to four zones with 18K + 6K + 6K + 6K wall-mounted air handlers.
Q: Can I install it myself?
A: Yes. The MRCOOL DIY system includes pre-charged Quick Connect lines, making installation easy without special tools or professional help.
Q: Does it both heat and cool?
A: Absolutely. It provides efficient cooling in summer and powerful heating in winter for year-round comfort.
Q: How energy efficient is it?
A: With advanced inverter technology and high SEER2 ratings, it delivers quiet, cost-effective performance while reducing energy use.
Q: What smart controls are included?
A: Built-in Wi-Fi allows full control via the MRCOOL app, Alexa, or Google Assistant for convenient scheduling and zoning.
Q: What’s in the box?
A: One 48K BTU outdoor condenser, four indoor air handlers (18K + 6K + 6K + 6K), pre-charged line sets, communication cables, and mounting accessories.
Q: Who is this system best for?
A: Perfect for homes, offices, or workshops needing customizable temperature control across multiple rooms.
Maintenance Tips
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Clean Filters Regularly: Wash or replace indoor unit filters every 4–6 weeks to sustain strong airflow and efficiency.
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Clear the Condenser: Remove leaves, dust, and debris around the outdoor unit for optimal heat transfer.
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Check Drain Lines: Flush condensate lines to prevent water leaks or mold buildup.
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Inspect Connections: Ensure refrigerant and electrical fittings are tight and corrosion-free.
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Seasonal Maintenance: Before heavy cooling or heating seasons, run a system test and listen for abnormal sounds or airflow issues.
