extractor before or after cooltube ?

just a simple extractor question about extractor placement. Do I place the extractor in the tent before the cooltube , or add it at after the cooltube ?
airflow:
carbonfilter>cooltube>extractor>outside of tent

or

airflow:
carbonfilter>extractor>cooltube>outside of tent

which model is better ?

good question. Is it a matter of opinion? I set it up the first way. Did not think it really mattered.

The majority will tell you to Pull the air away from it not push it through. Fans are more efficient that way.

Thanks that helps really it does

thanks guyz

atombomb said:

The majority will tell you to Pull the air away from it not push it through. Fans are more efficient that way.

Click to expand...

I never really understood this principle 100%.
If you put the fan before the light isn't it pulling and pushing air as it is if you place the fan after the light? I thought they did both at the same time?

Anyone else have any suggestions? Or an pictures of there setup?

I pull air through my filter, sent it through my lights, vent the hot air out my ceiling. I have a small fan blowing air from bottom into my chamber. then I vent it back to my filter. I'm a newb and not I'm done with my setup yet but seems to work.

The proper way according to the guy at my local hydro shop is to have your fan mounted near the top of your room/tent blowing air out and have ducting connecting to the end of the cool tube where the bulb connects (sucking the hot air out of the tube), and have ducting running from the other end of the cool tube to your carbon filter.

Fan>>>>Cool Tube>>>>Carbon Filter

Oh and he also said that passive intake is best if you have a good enough exhaust fan. i.e. you don't need a fan blowing air in the bottom, just an opening with some duct to let the air passively intake at the bottom of your tent.

I got a 265 cfm fan that pushes the air pretty well, so exhaust seems to be enough. But i've got intake fans on my veg cabs.

It's best to pull air through a cooltube for two reasons, firstly because any air leaks in the ducting/connections will be sucking air in, rather than blowing hot air back into the growroom, and secondly because most fan will pull better than they can push, so anything that creates resistance, like a filter or a cooltube, should have air pulled over it, not pushed.
Flamdrags you make a good point that the fan is still pullng and pushing at the same time, but it will work best if the resistance to airflow is on the pull side. If you want it explaining more then let me know, I gotta take my little one to playschool.