Is my fan too weak or is my carbon filter packed too tight?

Thrall

Member
Hi there, I recently built a stealth grow box and I've created an exhaust fan in the upper left corner of the box, pictured here:

2011-12-17 02.48.43.jpg

The fan is screwed onto that grate, the grate is full of active carbon and closed with a cap on the otherside which is also a similar grate.

However I don't feel much air pushing through the filter, I feel a little, but whenever I put my hand in front of the exhaust fan on the INSIDE, I feel more air blowing back which i'm guessing is because it can't push through?

On the outside of the box there is a bit of a breeze, but not too strong.

When I install the intake (bottom left of box) will that make it any stronger? This fan will also be at stem height with the plants to promote stem strength.

What should I do? Is this going to be ok?

The box space is 2 feet high, a foot and 10 inches wide and a foot and a half deep. The fan is rated with a 34 CFM. Here is a picture of the box (incomplete, still coming together, this will be for a stealth grow):

2011-12-17 02.59.09.jpg

Another thing, when the door is closed, on the side with the hinges, there is about a half milimeter gap between the door and the side of the box, will this be ok? I plan on growing two plants in here with alot of bending going on.

Also, this is going to be in a closet, under what will appear to be a pile of clothes behind a very large desk. However upon closer inspection, I have engineered a trap door under the desk that will let me pass through it and into a space which is basically a BIGGER box that will house this grow box and clothes and junk are thrown on top of it to make it look like my closet is a cluttered mess. It is ingeniously organized though :)

I have my own place, however I bring women and friends over from time to time, and I honestly am usually disgusted when I walk into a house and it smells like reefer. I'm a pothead, yes, but I hate the characteristics of your stereotypical pothead who doesn't care how much he smells like weed or how much his house smells like weed. Nothing personal to anyone here, I just want to be very discreet about this for anyone who comes over to my house.

This will be a soil grow. All tips for keeping smell out will be much appreciated. Thanks alot!
 
put the fans so it pulls the air through the filter rather then pushing it, i would not put anything on it as it is a fire hazard and will also retain more heat, i would grow 12/12 from clone in that space and not more then 4 max a screen would make for better yeilds
 
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