A flue is basically a pipe that sucks at one end and blows at the other.  The sucking and blowing is caused by pressure differences, which makes the various exhaust gases move to where the pressure is lower (which is the same reason that heat rises).

A flue is installed in a chimney for each combustion source.  The flues are then lined with a material that protects the chimney and flue from the heat and combusted gases.  The flue liner materials you are most likely to see include:

• Stainless Steel
• Aluminium
• Terra-Cotta
• Cast In Place Cement
• Composite clay-like materials

Which flue liner you choose will always depend on your particular situation.  The best thing to do is to note your chimney dimensions, the materials used to make the chimney, the heat source you will be using and then phone us up.  We will talk to our experts who will give us the advice you need.