MRCOOL® 12K DIY 5th Generation Mini-Split Air Handler (230V)

Take control of your indoor climate with the MRCOOL® 12K DIY 5th Generation Mini-Split Air Handler (230V)—a powerful, energy-efficient solution designed for larger rooms and open spaces, all with true do-it-yourself installation.

Built for performance and convenience, this 5th generation unit delivers reliable heating and cooling while eliminating the need for costly professional installation.

With 12,000 BTU of heating and cooling capacity, this air handler is ideal for:

• Large bedrooms
• Garages & workshops
• Living rooms
• Additions & open spaces

It can efficiently cover areas up to ~550 sq. ft., providing consistent, year-round comfort.

One of MRCOOL’s biggest advantages is its easy installation process:

• Pre-charged QuickConnect® line set (no vacuuming required)
• No special tools or HVAC certification needed
• Faster setup with reduced installation costs

This makes it one of the most beginner-friendly mini split systems available.

Equipped with advanced inverter technology and eco-friendly R-454B refrigerant, this system:

• Maintains consistent indoor temperatures
• Improves energy efficiency
• Reduces environmental impact

Enjoy complete control of your comfort with multiple options:

• Wireless remote control
• SmartHVAC® app (iOS & Android)
• Voice control via Alexa & Google Assistant

Adjust temperature, modes, and scheduling from anywhere.

The Follow Me® feature uses the remote as a temperature sensor, adjusting airflow based on your location to ensure maximum comfort wherever you are.

Dry Mode helps reduce excess moisture in the air, improving comfort and air quality—perfect for garages and humid environments.

• Gold Fin® coating for enhanced corrosion resistance
• Designed for long-lasting performance in various climates
• Built to withstand everyday use

The included DIYPRO® cable eliminates the need for electrical conduit, making installation faster, cleaner, and more durable.

If you need more power than a 9K system, the MRCOOL 12K delivers stronger performance for larger spaces—while still keeping installation simple and cost-effective. It’s the perfect balance of power, efficiency, and DIY convenience.