Weltevree offers several add-ons to improve the efficacy of Outdooroven and Outdooroven XL. Extra Meter Pipe is an extension for the chimney that safely allows extra ventilation. That causes a stronger draft effect which improves heat distribution for less cooking time. (The extension is easily added since it fits perfectly onto the standard Outdooroven pipe.) Chimney Cowl protects the oven pipe against rain and also orients the draft in the optimal direction in windy conditions. Magnetic Thermometer accurately relates when the oven reaches the desired cooking temperature.