The full line of American High Efficiency condensing water heaters have been designed to provide years of dependable service and feature industry leading technology. Models are available from 120,000 to 500,000 Btu/h and all deliver thermal efficiencies of 95% and higher. The unique helical coil heat exchanger limits weld joints for optimal service life while maximizing heat transfer. INTELLIGENT CONTROL SYSTEM WITH LCD DISPLAY • Exclusive American designed control system • Provides detailed water heater status information • Precise temperature control adjustable from 90 to 180 degrees • Built-in diagnostics • Run history information SUBMERGED COMBUSTION CHAMBER, WITH HELICAL HEAT EXCHANGER COIL • Positioned in center of tank, surrounded by water to virtually eliminate radiant heat loss from chamber • Direct spark ignition • Spiral heat exchanger keeps hot burner gases swirling, uses centrifugal force to maximize efficiency of heat transfer to water in tank • Spiral heat exchanger reduces lime scale from forming on water-side surfaces, which maintains energy efficiency over time POWERED ANODES STANDARD ON ALL MODELS • Provides long-lasting tank protection in varying water conditions • Powered anodes are non-sacrificial • Automatically adjusts output needed to properly protect the tank GLASS LINING • Glass coating is applied using a liquid slush coating technique to ensure uniform coating • Heat exchanger coil is glassed both externally and internally for optimum protection