An air treating apparatus such as a humidifier, evaporator cooler, cooling tower or other such equipment comprising a housing provided with evaporator means and water distribution means mounted in the housing above the evaporator means to provide a substantially uniformly distributed flow of water thereto. The water distribution means includes a tray provided with an upstanding or elevated target element located between a plurality of upstanding vertical wall elements forming channels leading to apertures positioned to distribute water uniformly to the evaporator means. Water directed to the apparatus impinges with a certain velocity head on the elevated top surface of the target element from where the water while still in motion impinges upon the top edges of the internal wall elements which divide and direct the water into the channels and from where the water is distributed to the evaporator means through the apertures.