1. A portable wireless remote control unit for use in conjunction with an HVAC system, the wireless remote control unit comprising: a wireless interface; a display; a controller in communication with the wireless interface and the display, the controller configured to communicate with the HVAC system via the wireless interface; the controller further configured to display one or more menu screens on the display; and the controller further configured to automatically determine whether the HVAC system is a zoned HVAC system or a non-zoned HVAC system, and to select from the one or more menu screens for display on the display based on whether it is determined that the HVAC system is a zoned HVAC system or a non-zoned HVAC system.