Question regarding vent and cooling

So i have a grow tent thats 36 length by 20 deep and 5' high.. I want to put an aircooled 250w hps and 2 42w cfls on both sides of it. My question is what cfm fans do i need to pull this off? And what cfm exhaust am i going to need? exhaust will but pulled negative to a vent.

3x your cubic feet is good venting

alright thanks any thoughts on the cfm's?

The small 4" should cover you, they are in the 170-180 CFM range. If you go any smaller you are going to end up with a duct booster fan. You can try the booster fan if you like, they are cheap enough 250 CFM, $25. I would go with the 4" inline but, everyones budget is different. Good luck.

MyPalaceIsInside said:

alright thanks any thoughts on the cfm's?

Click to expand...

ummm.... yeah, your cfm should be around 3x your cubic feet

thanks guys