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.
From Wikipedia, the free encyclopedia. A direct vent fireplace is a prefabricated metal fireplace that is part of a direct-vent system. Direct vent refers to a sealed-combustion system in which air for combustion is piped from the outdoors, and the vent products are vented to the outdoors.