3x3x6 setup, advice needed?

hey guys so I am needing to go to a smaller setup a 3x3x6 and when I made a 5x5x6.5 I think I screwed up some of the ventilation, so I am just wanting to make sure I have the cfm requirements correct on this setup... But I would need a 4 inch 200 CFM exhaust fan attached to a 4inch 200 CFM carbon filter because the carbon reduces some of the CFMs but it wont go below the required CFMs of 162 for this space (I got that number by mulitpling 3x3x6 together equaling 54 then multipying 54 by 3 for the 3 times air circulation equaling 162) and then I would just need a 162 CFM inline fan for a active intake. My lighting will be a 400 watt apollo cool tube connected to a 400 CFM inline fan on a duct speed adjuster. Does this sound right to you guys?
Thanks!!

I have the same setup. You have the correct cfm for your fans. I got a 192 4in cfm exhaust fan/w filter. And a 101 cfm for intake with booster to make it 200 cfm. I use passive intake and active intake together.

Same setup but i domt have the 400 in fan.. its the correct cfm i have a 600w and it handles that in there..

oh ok cool sounds good, thanks guys for your help! Do you guys think a 162 inline fan would be fine for a 200 CFM exhaust?

I think it's fine but perhaps redundant. You're out fan should pull enough air in unless it's restricted in some way

Which it would be a little by your filter and a bit by your tent but you should be bringing plenty of fresh air

oh ok so I should be fine just running a passive intake (no fan) set up instead of active intake with a 200 CFM exhaust?

I don't really like to mess around with ventilation. I ran a 4 inch fan and it just wouldn't cut it in the summer time. Upgraded to a 6 in 430 cfm fan aND I've been running 75-77 in the summer. In the fall/winter/spring time I can get the temps down to 72-76. Whatever I want really. Also when you get a bigger fan you can also dial it down, much more quiet this way as well.

oh cool, so I guess I am just going to stick with my 440 CFM I still have for my exhaust and just put a duct adjust on it and then use a 240 CFM with a duct adjuster (and drop it down till I have neg. pressure) for my intake... Do you guys think this will stay relatively quite?

mariachi said:

Same setup but i domt have the 400 in fan.. its the correct cfm i have a 600w and it handles that in there..

Click to expand...

6 inch wind tunnel inline fan, imvho tops in its class, best bang/reliablility for your buck too. there dark blue in color.