Chimney 96212 Exhausto Fan- Model RS12 This RS-12 Enervex Fan is the solution to smoking fireplaces, stoves, BBQs and more. It mounts directly on top of the chimney and ensures a perfect draft, or it will correct an existing draft problem. It's compact and low profile design make it almost invisible from the ground. Enervex fans may be used for wood and gas burning fireplaces, stoves, ovens and BBQ's, and is suitable for masonry or metal chimneys. Designed for minimum energy consumption using about as much as a regular light bulb