Originally Posted by f1100turbo
Help me understand how the tornado do ma jiggy works on a closed system ?
I agree that in a closed system the cyclone vent does nothing more than the regular vent cap.
However, with the shape of the cyclone and it being able to move in all 360 degrees, with any wind it should cause a vacuum on the back or vent side. So, in theory, when the toilet valve is open it should pull air/fumes up the vent instead of allowing air/fumes up through the toilet valve. I can't see the vacuum effect being enough to make a great difference.
If you have the fantastic fan on, I'm sure it would override the effect of the vacuum.