Quote Originally Posted by sirshamus
Just want your guy's opinion. Will be setting up flower room real soon(4 wide 4 deep 7 high), this big enough with a 600 hps? Another question, have option to vent out old furnace flu or dryer vent, have no neighbors next to me, at least an acre and a half both ways. The only thing i'm worried about the flu is if they were flying over the area using thermal imaging. I don't know, thought i'd ask people their opinion. The flu is probably 5 ft. from where i want to put room, and the dryer vent probably 15ft.
I think 600W would be fine in a 4x4x7 room as long as you have a blower fan providing sufficient ventilation, as well as a good 12 inches distance from the reflector to the tops of the plants. With a smaller light like 400W I think you can get away with 6-12 inches but it might burn them a little with the 600W.
I doubt that it really matters which you choose to be your vent but I might go with the dryer vent because it is farther away from your growspace. I like the idea of displacing some of the noise associated with fans.

:rastasmoke: