cooling water filter industrial HVAC towers water filtration sidestream filtration COOLING WATER FILTER For cooling water filter applications (condenser and closed loop systems), the side stream installation handles large flow rates and cleans your cooling system automatically without interruption of the flow. Our proven technology will maximize your chiller performance and provide a very short energy payback. Used for spray nozzle protection, VORTISAND® filters minimized municipal water consumption by switching to efficiently treated river water. The VORTISAND® cooling water filter gave opportunities to save on many other aspects.