Would these fans do the job (400W HPS).

well im back tx to every 1 who helped, ive decided itd prob be in my be in my best interests to listen do Zandor, he does seem to know his shit.. anyways ive got my eye on this now-

http://cgi.ebay.ca/180-cfm-blower-Hy...QQcmdZViewItem

OR

http://cgi.ebay.ca/265-cfm-blower-Hy...QQcmdZViewItem

I guess what im wondering if its worth the extra $15 to get the 265 cfm over the 180 cfm, and is it really a big difference? Im thinking of maybe going for the 265 just in case i do bigger grow in the future, also do you think the noise factor would be a big diff between these 2 models?

Ok, after looking some more i found these 'duct-fans' they look pretty dec IMO, tell me what you think.

http://cgi.ebay.com/6-Aero-Flo-Model...QQcmdZViewItem

Those inline fans dont look to bad keep the hose run as short as posible and they would work for you.

Now how about an exhaust for the whole grow room?

So in 3mo. I am planning on building about the same setup as Mrgreenfingaz with a 400w hps also and I was planning on using a fan from walmart as my air mover inside my grow room, what type of fans(s) would U recommend for an exhaust? I also plan on having a fan mounted across from my light blowing all heat away and out my exhaust.
I have 2 sprouts, 2- 2week old plants and 1 4week old going right now. I have the 2 sprouts under 2-100w sun cfl's, and the other 3 under my 150 hps on 18/6. Should my sprouts grow good at 18/6?

dude, look at the links i put up..

So Zandor do you think the 240cfm duct-fan would be sufficient for a carbonfilter/exhaust? They say you can wire it to plug into the wall also.

I say it's the minimum you could use. You should have a sealed open space between the out of the fans and the carbon filter. Or you don't get the full benefit of having the carbon; you only get that one small area and not the whole filter. Does that make since?

I think i get what your saying, do you mean something like the first pic, ill show u my other ideas i got. Do you think the cooltube idea would wourk with the fan?

I will find a way to draw it out for you and put it up later. it won't be an autocad drawing my computer has crashed but I will find a way.

I bought that exact fan. I hooked it up to home made cooltube and it was awesome. I used to be that putting my hand 4in under the bulb was uncomfortable, let alone constantly burning the tops of my plants. Now I can keep the cooltube about and inch or so away from the tops and there is no heat whatsoever. I have a 400w hps running the horilux eye bulb, but yeah those fans are a good buy imo:thumbsup: . As far as an exhaust fans for the cab go, if you are really tight on cash you can pick up a bathroom exhaust fan at Home Depot for about 15 bucks. i think they are rated at 80cfm. The only thing about those is you might have to spend a little extra time to sound proof some of it since i think those are noisy, but that all depends on how stealthy you are wanting your cab to be. Just my 2 cents. Good luck! -Diz:rasta:

K that would be dec Zandor :rasta:, also do you think that if i got a 420 CFM fan my third idea would work? just curious, urs is prob better.

Yo thanks for the help jdzz, thats good shit to know, ill look into a bathroom fan, but do u think itd be enough to pull air through a carbon filter though?