Treager has a smoke setting. Temps stay well below 150 for drying things out. I really like my treager if you haven’t noticedI’m more looking at building one for just doing jerky, bacon, and sausages
Another option just for jerky and such is to put a 1500w heating element in the bottom of a 55gallon drum, harbor freight router speed controller and use a smoke generator (a-maze-n-smoke)