CFM on the fan blowing air in the tent is different than the fan blowing air out?

[TheShmoopler]

Good morning!

I'm going to start my first grow here very soon in San Diego and half of the parts I'm using for my tent are from my brothers...

[bmwmotorhead]

so a few days ago I asked about putting a Vicks vapor humidifier in my tent and if u look at pic I just leaving the door open for few hrs a day and letting...