well, you need to
1) keep the temps in check
2) exchange the air in the room (bringing in new air)
3) circulate the air around the leafs

-the last one...
you need fans just moving air around because the plant will quickly use up the Co2 that is around the leaf.
harris7 Reviewed by harris7 on . using a fan durning flowering Do you need to fan your plants durning flowering? Rating: 5