Joe,<br />
As far as I’m aware (and someone please correct me if I’m wrong!), a smoker is merely an reasonably well sealed container, with a rack to hold the food to be smoked above the smoke source.<br />
The source of the smoke, is normally a tray of a certain type of wood chips, that are lit and allowed to smoulder (ie: no flames) away for a period of time, imparting the flavour of the wood-smoke to the meat/fish.<br />
There is very little actual heat involved.<br />
One thing I can’t seem to remember is if the food is pre-cooked before the smoking takes place or not.<br />
Hope this helps. <br />