It’s a common question during the early design phase of large mechanical systems: “Is open-loop or closed-loop cooling equipment better suited for this project?” When it comes to modern heat rejection technology, both open-loop and closed-loop cooling equipment provide a distinct set of advantages for the engineer, installer and building owner. The specific cooling needs of the application, along with the physical parameters of the installation site, budgetary considerations and environmental goals should ultimately determine the type of system that’s best-suited and specified. Over the past