ventilation help

for a grow box that is 3x3x4.5 any suggestions for a good a cheap way to get fresh air in and old air out

dajaw50 said:

for a grow box that is 3x3x4.5 any suggestions for a good a cheap way to get fresh air in and old air out

Click to expand...

Computer fans mounted over holes. One high to exhaust warmed air, one low to draw in cool. Put a bag of ExHale in with them.

Sounds elementary but be sure you mount your fans with 1 blowing IN and the other blowing OUT.

inline fan. Computer fan's don't move enough air. Especially when you add some resistance like a carbon filter, their cfm will drop to about 0. My space is smaller and i run a 4" inline fan just fine.

http://www.amazon.com/gp/product/B006YBPR3O/ref=as_li_tf_tl?ie=UTF8&tag=mr2shim-20&linkCode=as2&camp=1789&creative=9325&creativeASIN=B006YBPR3O">4

is there such a thing as having a fan that produces to much cfm for such a small area. i believe my cubic area is 40. lxwxh??? idk lol

yea if i get that inline fan you said, room would exchange like every 15 seconds

dajaw50 said:

yea if i get that inline fan you said, room would exchange like every 15 seconds

Click to expand...

That's fine. In a grow box situation I don't think you can go wrong with too much cfm. Creates more negative pressure in the room itself. Easier to keep smell under control and it is kind of like having a fan in the room blowing on the plants. Here I'll try to explain it.

Your grow box you say is 3x3x4.5 I assumed that was in Feet. Anyways, you want negative pressure. Basically you have the fan sucking air out of the box, you have a hole at the bottom of the box. So the air is being sucked in from the bottom and the hot air is going through the fan and out of the box. I don't believe in intake fans because that IMO creates a situation when you have air not flowing throughout the entire box as you would with negative pressure. That's a bit off topic but in essence. If your box ix 3'x3'x4.5' yes I would go with the fan I linked.

think this is a good one http://www.amazon.com/Hydropronic-Inline-Carbon-Filter-Control/dp/B002ZJNW1S/ref=pd_luc_sbs_02_02_t_lh ?? Also seems lile a dumb question but just to be sure...im if not doing hydroponic but it says it is that doesnt matter right?