Wood Pit Faqs 1: How does an offset smoker work? Our offset smokers consist of the firebox (the smaller box), the cooking chamber where most of the cooking takes place and an additional vertical cooking chamber if you choose one of our Durango models. You begin by building a fire in the firebox, the heat then flows out from the firebox, through the cooking chamber and out the chimney. You control the burn (combustion) rate and the heat produced primarily by the main butterfly damper on the firebox door. To a lesser degree the damper on the chimney is also used to fine tune the heat in the cooking chamber. 2: How is an offset smoker different than a vertical or rear firebox design? Here is the short answer: vertical and rear firebox designs are fueled by large amounts of slow burning charcoal with wood chunks added for flavor. Offset smokers are fueled by a small hot fire with wood being the preferred source for both fuel and flavor. 3: Can I grill and smoke on an offset smoker? Yes, th...