Quote Originally Posted by growmamma
All right guys, I am so lost when it comes to venting my cabinet grow. I have read and read through the forums but haven''t found the answer to my questions (or I have and just didn't realize it) I have several 12V computer fans I can use but that's not really where I'm lost lol..My cabinet is 2.5 ft tall by 2 ft wide and a depth of 1.5 ft. I'm using an old bathroom cabinet so it has holes cut out on the bottom for plumbing. Do I cover these holes up? Also, where should the placement be of my intake? I know the exhaust should be up high and I have a dryer vent and carbon filter for the outside. Is the intake supposed to be passive or should there be a fan blowing air in? If it's supposed to be passive do I use the holes at the bottom of the cabinet as the intake? I'll post some pics shortly but if any one could give me an idea as to where to start that would be great!!
1st thing. This is in the wrong board. this is a cabinet/growroom question, or a ventilation question; Not a basic growing question.

Do you know that the 1st thing you need to do is figure out the Cubic feet in your cabinet? To do this. Basic math. 2.5 x 2.0 x 1.5. That computes to 7.5 cf. So if you got a fan that would draw 7.5 cf per minute, then it would cool the cabinet in 1 minute. If you have a fan that is 150 cfm; It would clear your cabinet of heat in under 1-2 seconds. 7.5 divided by 150.

Intake is always at the bottom. Fan is always at the top.

Passive or fan driven intake is a matter of choice, and cabinet/room size. In your case cabinet is so small that passive intake will be all you need. Make sure you put a screen over the hole to keep out bugs/flies/moths that want to eat your plants.

There you go. Did that answer your questions?