The new commercial water heater system from Noritz America combines commercial-grade tankless units with system controllers, manifolds and other necessary components and accessories into fully assembled metal rack systems for shipment anywhere in North America. Noritz notes the prefabricated system significantly reduces the burden on the installer, who needs only to connect the water and gas lines, build the vent runs and set up the pre-wired system controller. Thirty-six different rack models are available, all specifically designed for the commercial Energy Star-certified NCC 199 condensing tankless water heater series. With a thermal efficiency of 94% DV, this model offers inputs from 16,000 Btu/hr., to 199,900 Btu/hr., and a maximum flow rate of 11.1 gpm.