Chiller Tonnage Equations and Guidelines   

Following is the basic chiller tonnage calculations used in the U.S. industry.  In most cases the process chiller efficiency is based on the evaporator tons rather than condenser tons.   For more chiller information contact: 

Weighted water tests:   If you were looking for guidelines & equations on plastics - Click here

(GPM multiplied by "Delta T") divided by 24 = Chiller Ton ..........divide same by 30 = Tower Ton

(Pounds of water/minute multiplied by "Delta T") divided by 200 = Chiller Ton.....divide same by 250 = Tower Ton

1 HP = 2544 BTU's/Hour

1 gallon of water = 8.33 pounds

Kilowatt (KW) = (Amps multiplied by Volts multiplied by.85 multiplied by 1.73) divided by 1000

This electrical equation deals with 3 phase calculations.

For metric conversion factors see the links below

Chiller Warranty Service- Click here for details

Professional Refrigeration Troubleshooter

The first hands on Chiller/HVAC/R troubleshooting handbook is out in publication. This is a must have book for you and your service technicians.  It will save you time and money along with passing on the vast knowledge of 60 years experience.

Click here for details

Click here for E-mail requests



Great electrical conversion links

SI units & Conversion factors:


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This page was last updated on May 7, 2018

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