The following diagrams are examples of typical installations. If your installation is not carried out by a HETAS approved person then your local Building Control office should be contacted. They will come out to see the installation and make sure that it conforms to current Building Regulations There will be a charge for this visit.

If you intend to use an existing chimney you must get it checked for soundness and blockages. It is very common in older chimneys for the bricks dividing connecting flue passages to be breached. If this is not rectified or a liner not installed then poisonous flue gases can pass through and come out through a fireplace in another room.

Lining a chimney with twin walled flexible stainless steel flue (always check manufacturers instructions).

We must repeat that these are all examples to give you an idea of what will need to be considered. You will need either a Hetas engineer or building control inspection for your particular installation.