Hey sorry I didnt see this post. I got a 600watt hps the cheap one and I got a 8 in exhaust fan from htg and I bout duct from a local hydro store make sure you get duct ventalation to, I got for $40 shit gets expensive. But I put the duct from my ac vent to my tent (on left side) put holes in it then I did the exhaust from the right side and it works great I was stressing that too but its good the 400 watt shouldnt be a problem as long as you got ac and exhuast you should be good. Soo hows the smoke? anything new?Yeah i look at htg almost everyday.. their deals are fucking great. I've been looking at the 400. I need something to increase my yield!! I'm just worried about heat. My grow is in the upstairs so I'm afraid that even with the tent open and an AC running with one of HTG's 8 inch fans exhausting it that it'll still be too hot.
IDK.
this is something i debate about everyday. I'm afraid of spending the money and not being able to keep the temps under control, or the odor. IDK .. im using almost 400 cfl so i don't know if the heat difference will be much either. I need a bit of advice on what i should do keep it cool. But i've been looking at everything from a simple 150 to a 400. probably paying extra for the cooltube. and exhausting it with htg's 8 inch fans, i forget the cfm rating. Anyways if you have any idea let me know. My tent is 2x4x5