A communicating thermostat is an equipment that can transmit sensory and control information to other heating, ventilating and air conditioning devices wirelessly. It can either have its own power or can be powered by a battery.
Communicating thermostats are wireless because they can transmit information via radio frequencies. They mostly use 24 volts, which means that they need low voltage control wires to transmit signals to heating, ventilating and air conditioning devices.
Unlike the traditional thermostat, a communicating thermostat is versatile as it can be managed locally in the building where it is installed and remotely over the Internet. It can also be managed centrally as part of a building energy management system on a master controller.