using charged energy to remove dust and other contaminates from a gas. It is important to match the polarity and type of charge to bind to and remove the pollutants from the gas. An example of the design of an electrostatic precipitator is a plate precipitator. The plate is a sheet of metal that is charged with a specific type of charge. These plates are designed to run parallel with the piping so that the gas will pass through by the plates and the plates will remove the dust or contaminate.