From my experience basements are generally damp add in the heat of the HPS lights your on about and you are certainly going to want to vent that air. The link OJB posted seems to be a good way to work out the size/amount of fans you need.
JackHerer Reviewed by JackHerer on . FIRST GROW HELP ME PLEASE!! I have a normal size basement that I will choose to start my grow in.I currently own a 1000hps and 2x600's.I just need advice on what should I do to keep the temps down.Should I go ac or FANS? If I go fans how many cfm fans will I need? ANY SUGGESTIONS ON HOW TO KEEP THE ROOM COOL?? Rating: 5