John I have made smokers out of Plywood for years and have had no problems I know a lot of other people that do this also and I dont think I would use the chip board to much glue in that stuff I also think if you keep temps down that you will not have a problem then again I have one plywood smoker in my back yard that is 25 years old and has been burn down twice I just rebuilt it I do know that they make a great smoker if used properly