Abstract: A control system includes a remote temperature sensor configured to wirelessly communicate a signal indicative of a space temperature, and a return air temperature sensor configured to output a signal indicative of a temperature of return airflow within an air conditioning/heating unit. The system further includes a controller segregated from the space that is responsive to the signals from the sensors for determining a working sensed temperature based upon a temperature value associated with the return air sensor and at least one temperature value associated with at least one remote temperature sensor. The controller is configured to compare the working sensed temperature to a set-point temperature and responsively generate a command signal to activate the air conditioning or heating unit to control temperature relative to a set-point. The controller controls the air conditioning/heating unit at all times based upon the temperature value associated with the return air sensor.

Abstract: A control module for a water heater includes a switching module that receives a voltage supply and outputs the voltage supply to the water heater. The water heater includes an electrical junction box that receives the voltage supply. A communication module communicates with at least one of an energy meter and an energy network external to the water heater and the control module, and receives information from the at least one of the energy meter and the energy network. The control module is mounted on the water heater and the voltage supply passes through or adjacent to the control module. The control module determines an operating characteristic of the water heater based on the voltage supply and selectively actuates the switching module to turn on and turn off the voltage supply to the water heater in response to the operating characteristic and the information.

Abstract: An apparatus for a water heater is configured to control heating operation of a water heater to maintain a desired water temperature. The various embodiments comprise a sensor that provides an output indicative of the sensed temperature of water in a water heater, and a controller in communication with the sensor. The controller is operable to initiate a present call for heat where the sensed temperature is a predetermined amount below a set-point temperature. The controller is also configured to determine whether a prior call for heat occurred within a predetermined elapsed time period preceding the present call for heat, and to respond thereto by delaying the start of heating operation in the present call for heat until one of a predetermined time period or a predetermined sensed temperature change has occurred.