I'm hopeful that a few on here have or maybe still do work at a hatchery and have had a hand in the fumigation process. I'm about to fumigated a GQF cabinet but I want to make sure I'm not missing something. I feel silly asking because I'm pretty sure I understand the instructions but I'd feel better KNOWING. The info that I've been reading for the process is to close the ventilators before proceeding. It seems all the info I can find is directed at hatchery personnel. Are these ventilators the same thing as the air holes on the sides and back of my GQF? I'm assuming the hatcheries have huge intake's/exhaust on their bators.