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The Vaillant ecoTEC plus gas-fired wall-hung heating appliance with efficient condensing technology ensures hot water comfort in the smallest space. A special heating basement or separate boiler room is not required. With the innovative electronic gas-air mix system (ELGA), less energy is consumed. This both saves energy costs and spares the environment. The Vaillant calorMATIC system control can be integrated perfectly in the easy-to-use new appliance interface with a plain text display. Configuration, setting and monitoring via the Internet is enabled very simply by the use of the comDIALOG communication module.