What is the primary function of a flue in gas appliances?

The primary function of a flue in gas appliances is to remove byproducts from the combustion chamber. When gas is burned for heating or cooking, it produces various byproducts, including carbon monoxide, carbon dioxide, and water vapor. The flue serves as a duct that safely expels these potentially harmful gases outside the building. This is critical for maintaining indoor air quality and ensuring the safety of users, as inhalation of combustion byproducts can lead to serious health risks.

The importance of the flue cannot be overstated, as it is integral to the safe operation of gas appliances. Proper installation and maintenance of the flue are essential to prevent backdrafting or blockage, which could lead to the accumulation of dangerous gases in the appliance or the home.