An EBS interface board with a temperature sensor is installed on a baseboard radiator. The sensor will activate once the baseboard temperature exceeds 90 degrees Fahrenheit (to a maximum temperature of 180 degrees Fahrenheit), indicating that heat is being delivered, and provide Energy Billing Systems with temperature readings. In addition, the 24 volt zone valve operation time is monitored. The sensors also provide tamper and meter error detection. The sensors are connected to wireless transmitters, typically installed on a nearby wall. As required, Repeaters are installed throughout the community to receive signals from the transmitters, verify them, and amplify the signal to peak power, for transmission to the receiver. The Receiver and Central Unit, typically installed in the clubhouse, decodes transmissions from the receiver and stores the meter readings for retrieval by Energy Billing Systems, Inc's billing computer. The meter readings indicate the number of "degree-hours" (time adjusted by temperature) that heat was delivered to each apartment each month. The degree hours are multiplied by the linear feet of the baseboard and by the BTU factor of the heating system, and divided by 100,000, to determine the relative amount of gas used (in 100 cubic feet = CCF).