Chimneys operate on the principle that hot air rises above cold air. The movement of hot gases rising from the fire creates a pressure difference between the inside of the flue and the room. This is called a “draught” and it forces air into the fireplace, this air feeds the flames as it rushes past the fire.
How Chimney Works?
Chimneys are an integral component of many homes, providing a safe, efficient way for the smoke and other byproducts of heating and cooking to be safely removed from the home. Knowing how chimneys work is important for anyone who has a chimney, as it is essential for proper maintenance and upkeep.
Chimneys work by using the principles of convection and gravity to draw smoke and other byproducts up and out of the home. The smoke is drawn up the chimney when hot air, generated by the fire, rises. This is due to the principle of convection, which states that hot air rises while cooler air falls. The rising hot air creates a draft effect, drawing smoke up the chimney and out of the home. This draft is also assisted by the principle of gravity, which causes the heavier smoke particles to fall, creating a second draft that helps to carry smoke up and out of the home.
In order for the chimney to draw smoke and other byproducts out of the home, it must be of the correct size and shape. If the chimney is too small, it will restrict the flow of air, preventing the draft from forming and the smoke from being drawn up and out of the home.