A damper is a device for controlling the flow of air or smoke in a chimney or woodstove. In its most common form, plate located in the fireplace or stove pipe with a control handle. For some stove there is an additional air control damper located on the exterior of the stove.
Deposits of hydrocarbons that were in the smoke going up the chimney that have condensed into a solid form.
(also referred to as a Saddle) A ridge that extends from the back of the chimney to the slope of the roof, with the purpose of shedding water away from the connection between the chimney and the roof.