Abstract: Apparatus for humidifying, cleaning and cooling of gases, especially air, with a filter layer disposed in the gas stream and a device for supplying it with liquid. The apparatus has a cuboid housing with upper inlets for outside and/or ambient air. In the housing is disposed at least one cage with a polygonal cross section and closed below. The upper surface of the cage is only partially covered by a centrally located fan, leaving a wide outer ring gap. Underneath the fan is an annular spray nozzle for the distribution of the liquid, mainly water, on an inner cage wall formed by a filter layer. The housing is equipped in its lower part with air outlet openings and in its upper part, partially covering the cage, with a channel for return of the air coming out of the cage to the annular gap at the fan.