Abstract: An ion diffuser has a frusto-conical surface made of thin metal in which surface are a plurality of emitter orifices. Around the perimeter of each orifice are a plurality of raised points that are angled toward a stream of dirty gases flowing through each emitter port. Submicron particles are ionized as they pass through the orifices when the metal is energized positively from a high voltage powerpack. A fan, to which are connected filaments, rotates above the frusto-conical surface and the submicron particles are collected by the filaments.

Abstract: A combined unit for purifying and destratifying heated air including a first inlet at a lower area for receiving air to be purified, an air purifier including an air demister and an electrostatic precipitator, a fan for drawing air through the first inlet and moving the air through the air purifier, a second air inlet in a higher area for receiving heated air to be destratified, nozzles for receiving purified air under pressure from the air purifier, venturis associated with the nozzles for creating a suction as purified air leaves the nozzles for causing stratified heated air to be drawn into the second inlet, air outlets for discharging a mixture of purified and destratified heated air, a plate with an opening between the air purifier and the second inlet; and a damper for selectively uncovering the opening for permitting purified air to be discharged through the second inlet.