- Relative cooling tower size is sensitive to the difference between the exit and wet bulb temperatures (see the table):
|Temperature Differential °F||5
- In commercial units, 90% saturation of the air is feasible.
- Tower fill has a highly open structure to minimise pressure drop, which, typically, is a maximum of 2 in. in H2O.
- Water in contact with air under adiabatic conditions eventually cools to the wet-bulb temperature.