The Pit Viper Power Draft Fan is best for ceramics, kettles and most backyard smokers.You can run medium size vertical smoker and extra large ceramic grills. Throttle the damper down for kettles, bullets, and smaller ceramic grills. The Pit Viper is a great choice for people who have multiple cookers of different sizes. The Pit Viper Ext. has a 6' lead wire so the blower and control can be mounted separately.