that is to mouch .. 30C is more like it .. 27C is prefereble ..
but tell me wher to you mesure the temps ?
also .. what kind of fan are we talinking about ? just for circulations ? then your plants dont resive mouch fresh air/co2 either .
need some kind of outtake ventilation to remove old/hot air/co2 and replace it agin with a few passiv intake holes ..
sumthing like this might work for a small place ?
cheap (12$) bathroom ventilation from my "walmart" .. can even get some strong and allmost silent once for 20-100$
now I dont know what kind of light your useing (more info and pics would be nice)
but one or two of them places at the top of the closed .. pulling air out .. and a few holes (double the outake size) at the bottom ..
but you also need to remember that they WILL stink like crazy once they flower .. so some kind of carbon filter is a must .. unless you want the guy down the corner to smell em ..
could get one of them replacement filters for cooker ventilations ..
also "walmart" .. cost like 8$ guess a littel dutch tape will fit it right on the outtake vent and take care of atlest most of the smell ..
good luck .. and continue to do some research and reading .. get them basic in order ..