Chiller Size Calculator

One of the most frequently asked about chiller specifications is how to determine sizing/tonnage. Properly sizing a chiller for your application can depend on a large number of variables. With over 10 years experience, SCYChiller can help you find the most suitable solution for your application.

There are also specific rules for low temperature(below 5°c) chiller sizing. Please feel free to contact us.

Fill in the boxes with the following three parameters to get the estimated chiller size you need for your application.

• The flow rate
• The incoming water temperature
• The chilled water temperature you require

Chiller capacity calculation formula:

• Calculate Temperature Differential = Incoming Water Temperature (°c) – Required Chilled Water Temperature
• Calculate water flow rate that you need per hour(m³/hour)
• Calculate tons of cooling capacity = Water Flow Rate x Temp. Differential ÷ 0.86 ÷ 3.517
• Oversize the chiller by 20% Ideal Size in Tons = Tons x 1.2
• You have the ideal size for your needs

For example, what size of chiller is required to cool 5m³ water from 25°c to 15 °c in 1 hour?

• Temperature Differential = 25°c-15°c=10°c
• Water Flow Rate = 5 m³/hour
• Ton Capacity = 5 x 10 ÷ 0.86 ÷ 3.517 = 16.53 Tons
• Oversize the chiller = 16.53 x 1.2 = 19.84 Tons
• A 19.84 Tons chiller is required