How a Chimney Works: VIDEO/DVD, The smoke from a campfire will travel in any direction, but why does the smoke in a fireplace only travel up the chimney? Bob Symes answers this question by explaining the principle of the air pump. Hot air rises; as the air in the fireplace is warmed it travels up the chimney and spills out the top. The warm air that leaves the fireplace is replaced by cold air from the room. Our chimney "air pump" only works in one direction.


			How a Chimney Works

The smoke from a campfire will travel in any direction, but why does the smoke in a fireplace only travel up the chimney? Bob Symes answers this question by explaining the principle of the air pump. Hot air rises; as the air in the fireplace is warmed it travels up the chimney and spills out the top. The warm air that leaves the fireplace is replaced by cold air from the room. Our chimney "air pump" only works in one direction. (9 minutes)

ORDER CODE: FFMBVL1648V
VHS VIDEO

ORDER CODE: FFMBVL1648DVD
DVD