Originally Posted by paulk
I understand that you could get about 2 hours on a single vortex bowl.
In my experience, a vortex bowl is good for one round of coals and won't last very long into a second round. It would be hard for me to get 2 hours out of a vortex mainly because packing it with enough moassel to last that long will restrict the flow too much. A vortex bowl is already the most restrictive part when using my KM or rebuilt AF and rebuilt hoses.
Personally I'd rather load a second vortex bowl and swap it when I start a second round of coals.