So, here goes; From what I hear MOST of the time, when people install fans inside their mask, they USUALLY place the fan as an EXHAUST fan inside the goggle portion of the mask. I've also heard of people placing an intake AND an exhaust fan, one on each side of the goggle.
Now I thought this was the only available option until I came upon something a tad-bit different
It's essentially a PC EXHAUST fan in front of the mouth, running constantly.
Now my question is; Which is best? Goggle Exhaust only, Goggle exhaust and intake, or mouth exhaust, or even all of the above?