ventilation fan

Totally new to this... as a matter of fact, I haven't actually started growing yet. I'm trying to get as much knowledge as I can before I try my first grow. I can keep my mouth shut, I live in the sticks, but I'm concerned about people who visit my home knowing what I'm doing from the odor...

anyone here heard of dirt genius? I was looking around at some of their stuff cuz I need a new ventilation fan for my setup. what do people recommend?