AERCO International introduces a water heater management system for its Innovation line of high-performance tankless water heaters. Available in four sizes, the stainless-steel WHM incorporates a unique master/slave backup feature that provides automatic transfer of master functions to the next unit on the chain, in case of designated master unit shutdown. The master water heater determines the unit to enable or disable based on run hours, which helps balance unit run hours, reducing service and maintenance costs. www.aerco.com