MRCOOL® 18k DIY 5th Generation 3 Zone Multi-Zone Mini-Split Condenser 230v

Take full control of your home’s climate with the MRCOOL® 18K DIY 5th Generation 3-Zone Mini-Split Condenser (230V)—a powerful, energy-efficient outdoor unit designed to heat and cool multiple rooms with one system.

Built for flexibility and simplicity, this condenser supports up to three indoor air handlers, allowing you to create customized comfort zones throughout your home—without the need for professional installation.

This system is engineered to power up to 3 zones, making it ideal for:

• Multi-room homes
• Garage + living space setups
• Additions and renovations
• Small apartments or offices
  

It can efficiently heat and cool spaces totaling up to ~750 sq. ft., giving you targeted comfort exactly where you need it.

Skip the expensive HVAC labor—this system is built for easy installation:

• Pre-charged QuickConnect® line sets (no vacuuming required)
• No special tools or certifications needed
• Faster, cost-effective setup

This makes it one of the most accessible multi-zone systems on the market.

With an impressive up to 23.9 SEER2 rating, this condenser delivers:

• Lower energy bills
• Consistent temperature control
• High-performance heating & cooling

It’s designed to maximize comfort while minimizing long-term operating costs.

This 5th generation system uses R-454B refrigerant, which is:

• More energy-efficient
• Lower environmental impact
• Future-ready compared to older refrigerants

Take control of your system from anywhere with:

• SmartHVAC® app (iOS & Android)
• Voice control via Alexa & Google Assistant
• Custom scheduling and temperature zones

Manage each room independently for maximum efficiency and comfort.

Each connected air handler operates independently, allowing you to:

• Set different temperatures in each room
• Reduce energy waste
• Improve overall comfort

Perfect for households with varying temperature preferences.

• Durable outdoor condenser design
• Advanced safety and protection features
• Industry-leading warranty options, including compressor coverage

Designed for dependable, year-round performance.

The included DIYPRO® cable:

• Eliminates the need for electrical conduit
• Protects against weather and outdoor damage
• Speeds up installation time

Compatible With:

• MRCOOL® 6K, 9K, and 12K 5th Gen air handlers
• DIY line sets and accessories

If you want multi-room climate control without complex installation, this MRCOOL DIY system delivers powerful performance, smart technology, and unmatched flexibility—all in one efficient package.