Will
Here is a site that goes over woods for smoking and they do list Chestnut as one the is suitable for smoking: http://www.bbq.com/faq/8.html#8.1
Jim
PS: I have never used it but if you do please report back what you think of it.
I'll let you know as soon as I have something suitable to smoke. Be patient, first, I need to threaten my body with medical attention; a bit of minor surgery.