My father in law hooked on up on our first house on the patio. They sell the systems at places like Lowes. I would think if you would use it quite a bit it would eb a great investment. It could be hooked up onto the building or maybe if it needs to be portable on some kind of 2x4 system if you have a handy person in your family or PTO!
We successfully used misters that were borrowed from a local greenhouse! We used zip-ties to attach the tubing to a frame from an Easy-Up tent and then the children walked through and around it. Inexpensive and effective.
Our school gets out mid June, so we really don't have that much of a need for this type of item. You would probably find a lot if you google "misting fans" on line or call the zoo and ask for their property maintenance department and see what brand they purchased.
Can anyone recommend a system for keeping everyone cool during a hot summer day event? Our zoo has a misting type system which sparked the idea. The only things we can find are a waycool system and a misting fan, both of which are not going to work. Any ideas to cool 1000 people?