According to one aspect of the invention a device for purification of air is provided, including a metal plate electrical connections connected to the metal plate in order to impress a voltage on the metal plate, a heating element for heating the metal plate, and a nozzle connected to a water supply in order to spray the metal plate with water. In further embodiments the device includes a metallic cylinder, a fan disposed at one end of the cylinder and a restriction disposed at the other end of the cylinder, together with live coils for providing an electric field, where the centre of the electric field around the coils coincides with the location of the device's other units.