I forgot to mention that my 400w MH is a compact system, with the ballast contained inside. I wish I could just move the ballast outside of the room, but this is not an option.

My fan is 6". I also have a 4" fan. I am going to post some pics in a moment. Please let me know what you guys think.
pot_head_sam Reviewed by pot_head_sam on . First Grow....First Problem....PLEASE HELP!! I just recently turned on my 400w MH (AgroSun). I hit high temps...like 90-94 and I am freaking out. I have a fan that should be bigger than what I need for the size of my room. Let me break it down first. My entire grow room is 3x7x7. I have two seperate rooms. The veg/mother room is 2x3x7 and the flowering room is 3x3x7. I am using CFL's in the veg/mother and the MH in flowering. I haven't started flowering yet...just getting the plants use to MH before flowering around christmas. Rating: 5