Heat issues with summer approaching

Im finishing my first grow, but today i went to the hydro store and bought a 260cfm dayton fan. I told the guy at the store i was going to use it for a exhaust fan/cooling of the room , and he said this fan will be enough exhaust for my growspace but it will not cool it.

So is there any other way i can avoid this problem?

Seems like I keep posting this pic this evening. Try a bucket of cold gel ice packs in water with fans on it.


It works well for my 5'x5' space. Drops the temps by several degrees. It's low tech and everyone can freeze stuff. The gel ice is 3x better at holding it low temps.