Ty's Wedding Rental would like to offer a cool solution to the hot summer days. Large industrial cooling fans are the answer! They move large amounts of air quietly through tents, barns, or the patio. One or two fans should be plenty. They're 30" wide, have a 1/4 HP motor, and move 9000 CFM.
This is one of the most missed items on the wedding day. About three will be enough for a 40x100' tent. They take about 200 watts.