Air cleaning device

A system for enhancing air filtration, which comprises:

• an air inlet comprising an air inlet area;
• a reduced cross-sectional area zone after the air inlet area, the reduced cross-sectional area zone comprising at least one nozzle;
• and
• an air outlet body after the reduced cross-sectional area zone, said air outlet body comprising at least a wall and an air outlet,
• a mixing chamber located within the air outlet body,
• wherein at least a zone of the wall of the air outlet body is permeable and comprises an air filter for allowing air from the outside of the system to enter the outlet body via the air filter, wherein the air outlet terminates at or above a horizontal plane defined by an upper surface of the air filter;
• the permeable zone being located on a lower face of the system characterized in that the permeable zone is adjacent to the mixing chamber, giving direct access to the mixing area from outside of the system, so that the permeable zone forms a floor of the mixing chamber and in that the angle formed between the floor and the at least one nozzle is between 0 and 40 degrees.