Chimneys work by removing byproduct gases, like carbon dioxide, from the air. Its function is not to remove hot air but to instead remove hot gases from the heating unit used in your home. We all think of “fireplace” when we hear “chimney,” but any heat source that burns fuel (wood, oil, gas, coal) requires a chimney. How does a fireplace draft work? how to increase chimney draft.

Does a fireplace chimney have to go straight up?

Fireplace flues are intended to provide the inflow of oxygen to aid combustion and the outflow of fumes and gases. Both of these objectives are best accomplished by a flue that rises straight up from the fireplace.

What is on the inside of a chimney?

The interior lining of a masonry chimney is the flue lining. The lining protects the chimney walls, and ultimately your home, from heat and corrosion. Linings can be composed of ceramic, metal or clay. It’s hard for a typical homeowner to identify damaged flue lining.