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.
Generally direct vent fireplaces/stoves use a type of double walled pipe that serves to bring in combustion air through the outside pipe wall and vent exhaust out the center. This system can be vented through an outside wall just like haus proud said or through the roof.