I am thinking of buying a Twin door brinkman charcoal today. It will sit on the firebox of my Lang 48 mobile I think. The intended use would be for poultry and second duty as warmer without a fire in it just getting heat of my firebox. I wonder how long before I would burn this sucker out if I buy it setting on my firebox and with a fire of its own in it sometimes. LOL Any Thoughts?