Manufacturers of Cooling Towers & Systems by Delta Cooling Towers, Inc.


Selecting & Sizing

To use our tower selecting program, click on the link below:

Cooling Tower Sizing Program


The following design data is required to select cooling towers:

  • Flow Rate in GPM
  • Range of cooling in °F (T1 – T2)
  • Area Wet Bulb Temperature in °F (Twb)

The Design Heat Load is determined by the Flow Rate, and the Range of cooling, and is calculated using the following formula:

Heat Load (BTU/Hr) =  GPM X 500 X ° Range of cooling

If the Heat Load, and one of the other two factors are known (either the GPM or the ° Range of cooling)  the other can be calculated using this formula.

  • GPM = Heat Load (BTU/Hr) / 500 X ° Range of cooling
  • ° Range of cooling = Heat Load (BTU/Hr) / 500 X GPM

The Design GPM and the ° Range of cooling are directly proportional to the Heat Load.