Bosch’s Greentherm 9000 Series offers nine models for high-efficiency domestic hot water in residential or commercial applications with features for easy installation, operation and maintenance. The Greentherm 9000 Series features a Uniform Energy Factor of 0.97 with thermal efficiency of 100%. This series achieves temperature stability of +/- 2° F through the active bypass. Its wide operating range — between 9,000 and 199,000 Btu — saves energy when hot water demand is low. The premium 9900i SE model has a unique, stylish glass front and integrated Wi-Fi control that enables the user to control the water heater remotely via a free mobile app. Bosch Thermotechnology Corp.