What is chimney draft?
In order for the fire to burn properly, the chimney must pull combustion air through the fireplace or stove. At times, however, there is a negative pressure in the chimney causing chimney draft. There are several causes of chimney draft such as improper flue sizing, flue blockage, resistance from below, insufficient chimney height, and so on. Relining a chimney often has a positive effect on chimney draft.
