Although Chicago is known as the Windy City, it is in fact less windy than many other major American cities. Average wind speeds range from 8 miles per hour (13 km/h) in late summer to 12 miles per hour (19 km/h) in spring months.
A flue is a duct, pipe, or opening in a chimney for conveying exhaust gases from a fireplace, furnace, water heater, boiler, or generator to the outdoors.
Air supply. A damper in a stove chimney flue (1) controls air supply by being set open (2) or closed (3). Keeping the air flowing correctly through a wood-burning stove is essential for safe and efficient operation of the stove.