For sativa's keep it tall...like to the roof.that exaust fan will work great with a carbon filter...without one it is stronger then you need,but it can never be too strong(you want the fan to replace the air within 5 minutes)
Flower with 1000w HPS and veg with 400-600 MH.Get some floro's for the seedling's.Sprouting under HID's is not for beginners...I'm doing it mas we speak and it's a bitch.
So make your room at least 6x6 and all the way to the roof.

If you want to just ask me anything ,just pm me(personal message through this forum) :thumbsup:
J DOG 6000 Reviewed by J DOG 6000 on . Building a grow room! (Need Advice) I'll be starting at ground floor, with absolutely nothing. I'm not sure how big to build it, either. It should be big enough to flower 10 Sativa's. Maybe 5'x5'x7'? I'll also be building a veg box for a mother and future clones, and again, not sure how big to build it? How big does my exaust fan need to be, also? I was thinking about a Dayton 465 cfm squirl cage blower, and some sort of carbon filter for exhaust. Lights, I figure for flowering a 1000 watt hps, and for veg a 600 watt mh, Rating: 5