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Temperature control

posted 14 Feb 2010, 01:05 by Toby Roscoe   [ updated 14 Feb 2010, 01:13 ]

The room and water heating systems in your home or business are the most intensive uses of energy in your control. This means that it is essential to manage them intelligently in order to save energy, reduce bills and emissions of greenhouse gasses. 


There are various types of energy management system available, but in the past people have often opted for the cheapest upfront cost without considering that a superior system will pay for itself many times over through its lifetime. This is especially the case as energy costs continue to rise dramatically. 


thermostat is a device for regulating the temperature of a system so that the system's temperature is maintained near a desired setpointtemperature. The name is derived from the Greek words thermos "hot" and statos "a standing". The thermostat does this by switching heating or cooling devices on or off, or regulating the flow of a heat transfer fluid as needed, to maintain the correct temperature.

A thermostat may be a control unit for a heating or cooling system or a component part of a heater or air conditioner. Thermostats can be constructed in many ways and may use a variety of sensors to measure the temperature. The output of the sensor then controls the heating or cooling apparatus.

The first electric room thermostat was invented in 1883 by Warren S. Johnson.

Common sensor technologies include:



Thermostatic radiator valve, a self-regulating valve fitted to hot water heating system radiators. The TRV controls the temperature of a room by regulating the flow of hot water to the radiator. Thermostatic radiator valves (air vent valves) also exist for steam radiators.

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