I should note that I added an air intake plenum to my machine and that my machine is almost completely sealed when the lid is closed.
I have an outside / fresh air intake as well as fume extraction connected to my machine.
My fume extractor sits outside of the shop built into the exterior of the wall.
The blast gates on the intake and extraction are critical. Otherwise hot humid air will condense inside of the machine (because the machine is in air conditioned space).
