Abstract: A controller for use in a building control system includes an input, an output, a processing circuit and a communication circuit. The input is operably connected to receive sensor information. The output is operably connected to communicate control information. The processing circuit is configured to generate the control information based on the sensor information and at least one set point. The processing circuit is further operable to generate web pages including one or more building control values. The communication circuit is operable to communicate the generated web pages to an external web client. The communication circuit is preferably further operable to communicate an executable program to the external web client. The executable program is configured to cause the external web client to automatically poll for updates to at least one of the one or more building control values.