Airflow question for Growtent

Ok I have a 4x4x7 growtent with a 600 watt cooltube in it. I have a fan cooling the light and two fans on the ground rotating. Now should I have another fan blowing fresh air into tent? If so what kind of fan should that be? And how could I do this?

Im sorry but im also new to this and dont have your answer im myself looking for the same answer aswell as do you have a carbon filter and inline fan and if yes how is it connected to your cooltube and out the tent ?

You want a fan pulling air out rather than air in, air will come in passively due to the resulting pressure difference.
This way, if you decide to filter your smelly air it will all get pulled through the filter.
Dunno how hot it is where you are, i'm ok with just a 6' centrifugal fan pulling through my filter, and im not bothering to go through my cooltube, until the weather gets hotter. Only reason for this is that when all the fans are on at once it gets suspiciously noisy.
If you need you can duct the filter->cooltube->exhaust fan-> outside tent
That will pull old air out and use it to cool the light as it does it.
Exchanging the air from outside to inside is essential for CO2 to reach the plants (GROWTH )
good luck sir

SupremeRemy said:

Im sorry but im also new to this and dont have your answer im myself looking for the same answer aswell as do you have a carbon filter and inline fan and if yes how is it connected to your cooltube and out the tent ?

Click to expand...

Have the filter in the tent, connect it to the cooltube, connect it to the fan blowing air out, duct that air outside. I have a silencer outside as well.
I think that is the common way of doing it.
Although at the moment I am not using the cooltube, so I just have my filter sitting upright on a milk crate, with the 6' fan on top of it, pulling air out the tent through some ducting.

thanks BBoybojo, very helpful.

Thanks BBoybojo