Fill or Packing

The narrow boards or plastic slats placed inside the tower to intercept the falling water. The resultant splashing exposes new water surfaces to the air, and thus increases the efficiency of heat and vapor transfer from water to air. That part of a crossflow, counterflow, or natural draft tower consisting of splash bars, vertical sheets of various configurations, or honeycomb assemblies, tile, or other materials, that are placed within the tower to effect heat and mass transfer between the circulating water and the air flowing through the tower.