One of the hardest things to decide when installing a new evaporative cooler is what size is appropriate.  We receive questions all day long.  Lucky for you the leading manufacturer of coolers has an easy tool to take the guesswork out of this for you to determine a calculation.  Click on the link below to estimate the cubic feet per minute calculation: 

https://phoenixmanufacturing.com/calculators/standard-cfc-calculator/