Abstract: The invention relates to a method that comprises generating air flows (2) in the form of an air curtain in front of openings of the face to be protected using ambient air without preliminary purification, and directing said flows (2) in such a way that the flow lines do not intersect the planes of the openings of the face to be protected and reject aerosol particles in the vicinity of said openings. The configuration of the flows (2) is selected so that any vector extending from the surrounding medium through the air into the plane of the openings of the face to be protected, intersects at least one of said flows (2). The speed and the transverse section of the flow (2) are selected so that the acceleration gained by the aerosol particles falling into the flow from the surrounding medium, is sufficient for diverting them from the sections of the face to be protected.