QUOTE (Big B @ May 29 2010, 10:52 PM) index.php?act=findpost&pid=327763
That's backwards to avoid fogging. It's okay to temporarily 'recirculate' the system when you have a diesel truck in front, or when the interior is at 140º, but you need fresh air to avoid fogging your windows. Having the system in recirculate is like blowing your breath on a window; it fogs up once the air inside the car is saturated. Hope it makes sense.
