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How-To
7/8/2009
IGCadmin
Around the Backyard Post
To size an evaporative cooling system, you first need to find the CFM (cubic feet per minute) requirements. CFMs are essentially just the volume of air in your building, the standard being that you want to move the entire volume of air within one minute.
Finding your CFMs:
Length X Width X Height = CFM (As a rule, we typically use 12 for the height value in this equation.)
Let's assume a 30'x48' structure:30 X 48 X 12 = 17,280 CFMs
Using this you can size your fans, inlet shutters,...
