System and method for air decontamination

A system (1) for air decontamination of a three-dimensional (3D) space having a top (2) and a bottom (3) being offset in direction of gravity with respect to the top (2), the system (1) comprising

• (I) at least one canopy (4) comprising a canopy top (5) positioned essentially at the top (2) of the 3D space and bordered by a circumferential bordering element (6) extending from the canopy top (5) towards the 3D space, wherein the canopy top (5) and the bordering element (6) define a partial volume (7) of the 3D space,
• (II) at least one air inlet member (8) positioned in the partial volume (7), and configured to draw in air from the partial volume of the 3D space and optionally from the 3D space, and
• (III) an air displacement device (9) configured to move air from the at least one air inlet member (8) through a filter device (10) and through at least one air outlet (11) into the 3D space, optionally into the 3D space essentially at the bottom (3) of the 3D space, wherein the filter device (10) is configured to filter ultrafine particles from the air drawn in through the at least one air inlet member (8) and optionally filter ultrafine particles from fresh air,
• wherein the system (1) is configured to draw air in a substantially laminar flow essentially in direction of the bottom (3) of the 3D space to the top (2), optionally essentially from the bottom (3) to at least the partial volume (7), and wherein the system is configured so that the substantially vertical laminar flow has an average speed of about 0.005 m/s to 0.08 m/s, optionally about 0.005 m/s to 0.04 m/s, optionally about 0.005 m/s to 0.02 m/s.