Ya i have one as of right now I was going to add another if needed,but......
Lol there always is in my head, lol. Well I know with my hood and light config., that my 400cfm is hooked to a theromast which is connected to my light and it is periodically on and off, so far seems to work i know with 2 i will have it on 100% of the time the lights are on, but i wanted to test it out before I based another online fan there 125 bucks for a decent one.
ya i think thats what i will have also but on a timer to only run when the light is on.
Bad idea brotha cus if you get some weak ventalation that is a good recipie for mold or mildew. I would keep those fans on all the time.