Understanding Flues. A flue is simply a passage for conveying exhaust gases from an appliance to the outdoors. A flue may be a duct, pipe, vent, or chimney. An unlined chimney is technically a flue, even though an unlined chimney is a fire hazard. This can cause confusion, as many view flues not just as a passage for venting, but as a safe passage for venting.
Show map of the US. Fort Ontario is a historic fort situated by the City of Oswego, in Oswego County, New York in the United States of America. It is owned by the state of New York and operated as a museum known as Fort Ontario State Historic Site.
The Battle of Fort Lee. November 20, 1776 at Fort Lee, New Jersey. Fort Constitution, later named Fort Lee, was constructed atop the New Jersey Palisades. Its sister garrison, Fort Washington, occupied an elevated position across the Hudson River on Manhattan. They were built to cover a line of obstructions across the Hudson River to bar the movement of British ships.