MRCOOL DIY 5th Gen Mini Split - 4-Zone 48,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 24K + 18K + 9K + 6K Wall Mount Air Handlers - DIY5-4Z-48HP-24K18K9K6K

MRCOOL DIY 5th Gen Mini Split - 4-Zone 48,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 24K + 18K + 9K + 6K Wall Mount Air Handlers - DIY5-4Z-48HP-24K18K9K6K

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

• Customize mini-split system: choose the perfect line set length for each zone just above the “Add to Cart” button.
• Ultra-Efficient Cooling & Heating: Enjoy up to 21.8 and 10 HSPF2-4 for energy-efficient year-round comfort.
• DIY-Friendly QuickConnect® Installation: No vacuuming or professional tools needed — pre-charged line sets make setup fast and simple.
• Smart Voice & App Control: Full control via SmartHVAC app, Alexa, Google Assistant, or included wireless remote.
• Eco-Conscious Refrigerant: Uses R-454B refrigerant with a low environmental impact.
• Industry-Leading Warranty: Includes 5-year parts, 7-year compressor, and lifetime replacement with MRCOOL® Care registration.

What our Experts Think

• Powerful 4-Zone System: 48,000 BTU condenser with 24K + 18K + 9K + 6K air handlers delivers efficient heating and cooling across multiple rooms.

• Custom Comfort: Each zone can be independently controlled for personalized temperature settings.

• DIY-Friendly Installation: Designed for easy, tool-free setup without professional assistance.

• Quiet & Energy-Efficient: Advanced inverter technology ensures low noise and optimized energy savings.

• Smart Control: Compatible with mobile apps for remote operation, scheduling, and monitoring.

• Durable Build: Corrosion-resistant condenser provides long-lasting, reliable performance in any climate.

Q&A

Q: What type of system is the MRCOOL DIY5-4Z-48HP?
A: It is a 4-zone, 5th Generation ductless mini split with air conditioning and heat pump functionality.

Q: What is the total cooling capacity?
A: The system delivers 48,000 BTU across four zones.

Q: What are the capacities of the individual air handlers?
A: One 24K BTU, one 18K BTU, one 9K BTU, and one 6K BTU wall-mounted unit.

Q: Is this system DIY-friendly?
A: Yes, it includes pre-charged lines for easy do-it-yourself installation without professional help.

Q: Can each zone be controlled independently?
A: Yes, each air handler features its own thermostat for individual temperature control.

Q: Does it provide both heating and cooling?
A: Yes, the heat pump condenser offers efficient year-round comfort.

Q: What are the key benefits of this system?
A: Energy efficiency, wireless smart control, customizable comfort by zone, and hassle-free DIY installation.

Maintenance Tips

• Clean indoor air filters monthly — Remove and rinse each zone’s filter with lukewarm water; let it dry completely before reinstalling.

• Wipe indoor air handlers using a soft, damp cloth to prevent dust buildup that can affect airflow and cooling efficiency.

• Inspect outdoor condenser coils every 3–6 months — Use a soft brush or low-pressure air to clear leaves, debris, or dirt.

• Keep the condenser area clear — Maintain at least 24 inches of clearance on all sides to ensure proper airflow.

• Check the condensate drain lines periodically for blockages or algae buildup; use a mild vinegar solution to flush if needed.

• Inspect line set insulation annually to ensure it remains intact and sealed from UV damage or moisture intrusion.

• Use the self-cleaning function (if enabled) on each air handler to reduce mold and odor buildup inside the unit.

• Operate in “Fan Only” mode for a few minutes after cooling — helps dry out coils and prevent mold growth.

• Monitor system performance via the MRCOOL SmartHVAC app to catch temperature irregularities or zone inefficiencies early.

• Schedule an annual professional inspection to check refrigerant levels, electrical connections, and overall system health.

• Check wall brackets and mounts periodically to ensure all indoor units are secure and vibration-free.

• Avoid overloading one zone — distribute usage evenly to maintain consistent performance and extend compressor life.