Patent ID: 8444747
Filing Date: 2013-05-21
Classification: A61G,F24F

Abstract:
1. A method for displacing body convection and providing a controlled personal breathing zone comprising taking air from a premises into an air treatment device adjusting the air temperature by either heating or cooling of a supply air stream depending on ambient air temperature and purifying a flow of air in said device by adjusting the temperature either before or after filtration using one or more HEPA filters discharging the purified air stream through an air supply device, situated above or adjacent to the personal breathing zone, as a substantially laminar descending air flow with a velocity determined by the difference in air temperature between the supplied air and the ambient air at the level of the personal breathing zone said velocity being higher than 0.1 m/s without the requirement for a secondary heated air stream wherein said difference in air temperature is maintained within a range of 0.3 to 1 ° C. cooler than the ambient air at the level of the personal breathing zone.