The Vertiv™ Liebert® EFC (Evaporative Free Cooling) units are the next generation of indirect evaporative cooling systems for Data Centers and critical infrastructures, covering cooling requirements from 100 to 450 kW. The series combines Indirect Air-to-Air Heat Exchange, Multi-Step Evaporative Cooling and Inverter-Driven DX Cooling technology with low GWP R454B refrigerant, offering extremely high energy efficiency and a significant reduction in operating costs. Thanks to the patented Composite Heat Exchanger, the new DX Priority control logic and the ability to switch between Wet Priority and DX Priority modes, the EFC series dynamically adapts to the prevailing environmental conditions, ensuring continuous cooling and optimal performance. The solution is available as a fully integrated system (Turn-Key Solution) for quick installation, easy maintenance and future expandability.