Carbon fileter and ventalation set up?? +rep :)

Hey peoples!! So I'm about to receive my 6inch inline, carbon filter combo. Getting ducting tomorrow. I'm wondering if it makes a difference or not. Should I set it up so the fan is right at the filter pulling through that and blowing along through the light and then out? OR, have ducting between the carbon filter and light and have the fan at the end of the duct pulling everything that whole way??

If the filter noticeably decreases the airflow of the fan, you put the fan on the filter. If the filter is free-flowing enough not to considerably impede your fan's airflow, you put the fan after the lamp.

Mother's Finest said:

If the filter noticeably decreases the airflow of the fan, you put the fan on the filter. If the filter is free-flowing enough not to considerably impede your fan's airflow, you put the fan after the lamp.

Click to expand...

So lets say the filter is free-flowing and doesn't impede the air flow. Why is it better to have it after the lamp? And do you mean after, but still inside the tent? or after, but outside the tent like at the end of the line? I really appreciate the response!! Thank you!!

I tried giving you rep but i must have done that recently with you already

First off, we aren't currently talking about what an ideal air circulation system might be, we're just choosing between the two options you listed. There of course can be some better setups depending on what resources are available and what your priorities are.

The general reason to put components before the fan is because centrifugal fans pull better than they push. The more restrictive the filter is, the greater the impact of certain problems becomes, most from imperfections found in every system, until the drawbacks outweigh the benefits.

The more freely air flows, the less change in pressure there is, and vise versa. The more restrictive the filter is, the greater the vacuum between the filter media and the fan, up to the maximum vacuum the fan can generate. The more components, joints, etc. between the filter & fan, the more tiny leaks there are likely to be. The higher the vacuum, the more CFM is lost in a leak and the greater the chance new leaks will form. Aside from leaks, any pathway the vacuum is inside of can deform (bend inward), which absorbs some of the energy. Also, the more area between the fan & filter, the less suction actually gets to the filter.

Nearly all of these are irrelevant if the filter isn't restrictive enough to increase vacuum, where the benefits of having components before the fan come back into play.

are you using a cool tube or a sealed light(sure sounds like it)? makes a big difference in how you try to scrub the growing area.

Ok, very nice!! Thank you Mother's, and wiseguy. I'll have to test it out when I get it. I really appreciate the info. And yes, I am using sealed reflector, 6inch holes. Thanks again!!