A glass surface with intuitive touch control buttons and display combines design, feel, and functionality in an outstanding way. The internal controller of the JOY calculates control values for fans and heating/cooling applications, which are provided via analog or digital outputs (depending on type). The possible integration of various external sensors (e.g. window contacts, change-over, condensation sensors, etc.) allows temperature and fan control tailored to the application. The device can be mounted in a standard flush-mounted box.