Abstract: An electrostatic precipitation air cleaning system for removing mist, smoke or particles from an air stream. The electrostatic precipitation air cleaning system includes an ionizer, a collector, and an exhaust fan configured to draw the air stream through the ionizer and the collector. The electrostatic precipitation air cleaning system includes a high voltage power supply that provides an ionizer voltage to the ionizer and at least a first collector voltage and a second collector voltage. The electrostatic precipitation air cleaning system includes an electrostatic precipitator controller coupled to or integrated with the high voltage power supply and operable to select one of the at least the first collector voltage and the second collector voltage to provide to the collector.

Abstract: A method and apparatus for controlling temperature and humidity of an air stream by chilling a cold storage material and warming a heat storage material by evaporation and condensation respectively from a fixed capacity refrigeration cycle, and selectively cooling and warming the air stream by controlled heat transfer from the cold and heat storage materials.