just make sure you are sucking hot air out instead of pshing cold air in. This means you should keep your fan for exhaust as high as posible to suck out the heat that rises. if your room is air tight or very close to it you can use both fans for exhaust and just have ventilation tubes going from inside to outside. sucking the air out will make a vaccum in your room automatically sucking air in from outside. my exhaust system only uses one fan for exaust of my room and one for exhaust of my lights. hope this will help...
santacruz_organic Reviewed by santacruz_organic 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