what should i do . i have a closet and it has doors on it and im woundering if i should put a lock on this . i also need help because i have a really big fan and if my closet door is closed it gets about 80'f in there . probably 90 in the summer but right now its pretty cold . the thing is the fan is on the floor and i know heat rises but is it ok as long as i have a fan because i know your suppose circulate fresh air thats why you leave the door open right .