MRCOOL DIY 4th Gen Multi-Zone 4-Zone 48,000 BTU 21 SEER (9K + 9K + 12K + 24K) Ductless Mini-Split Air Conditioner and Heat Pump

DIY 4th Gen Multi-Zone 4-Zone 48,000 BTU 21 SEER (9K + 9K + 12K + 24K) Ductless Mini-Split Air Conditioner and Heat Pump

The MRCOOL DIY Multi-Zone 48,000 BTU 21 SEER 4-Zone Ductless Heat Pump Split System provides powerful, energy-efficient heating and cooling for up to four rooms with a 48,000 BTU condenser and a combination of four indoor air handlers—two 9,000 BTU units for spaces up to 350 square feet, one 12,000 BTU unit for 550 square feet, and one 24,000 BTU unit for larger areas. As a heat pump system, it can reverse operation to draw heat from the outdoor air during colder months, offering year-round climate control. Designed for easy, do-it-yourself installation, this system requires no special tools or professional training, saving you thousands on installation costs.

This MRCOOL DIY 4th Gen Multi-Zone system can support up to five indoor units, making it a scalable solution for larger homes. The system's Quick Connect lines are pre-charged with eco-friendly R-410A refrigerant, eliminating the need for an HVAC technician. Simple step-by-step video instructions guide you through the DIY installation process with ease.

With its multi-season functionality, this unit cools in summer, heats in winter, and dehumidifies in humid conditions. You can monitor and control each room’s temperature via the MRCOOL Smart Controller app, the digital display on each air handler, or using Amazon Alexa or Google Home voice commands. A wireless remote is also included for convenient operation.

Each air handler features directional airflow control, ensuring even distribution of heated or cooled air for maximum comfort. For situations requiring forced cooling, manual operation mode allows for system testing or emergency use. In auto mode, the unit will adjust airflow as needed to maintain the desired temperature, while the drying function regulates humidity without drastic temperature changes.

For energy savings, Sleep Mode automatically adjusts temperatures over an 8-hour cycle, and a programmable timer lets you set heating or cooling schedules to optimize energy use. The troubleshooting display provides error codes and maintenance alerts, including low refrigerant warnings and filter cleaning reminders to keep the system running efficiently. If a power outage occurs, the system will automatically restart with its previous settings. To reduce noise and distractions, the mute function disables alerts and turns off the LED display.

The MRCOOL DIY Multi-Zone 48,000 BTU 21 SEER 4-Zone Ductless Heat Pump Split System delivers customizable, high-performance climate control with the simplicity and savings of a DIY installation, making it the perfect solution for homes requiring zoned heating and cooling with smart home integration.

• Easy DIY® Installation
• "Pre-charged DIY®
• Quick Connect Line Set
• Simple to Use
• Multi-room Comfort
• Energy Efficient DC Inverter
• 100% Sealed System
• Gold Fin® Condenser
• Eco Safe R-410A Refrigerant
• Smartphone App Controls
• Lifetime Technical Support
• Follow Me® Feature
• Low Ambient Cooling
• 16ft Line Set for each Air Handler

Your Satisfaction with MRCOOL is Guaranteed:

• 5 Year Parts Warranty, 7 Year Compressor Warranty
• Lowest Price Guarantee