People will post about fan and filter cfm, how to calculate tent volume, that you need to exchange the air every x number of minutes etc.Like the title says, is an exhaust setup needed for a 2x2 or 2x3 to keep a few clones and maybe a mother in if temp and humidity are already good?
Or would leaving a small vent open with an oscillating fan blowing inside the tent be good enough for air exchange?