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.
A fireplace may smoke for the following reasons: 1  The fireplace opening is too large in relation to the width and height of the flue/chimney. 2  Your chimney may be obstructed or clogged and needs a professional sweeping, if there is more than 1/4â of soot in the flue, thatâs a sign its time for a cleaning.