I was at a pub yesterday sweeping a couple of chimneys, one was a lovely big open fire and the other a twinwall system connected to a multi fuel stove. The pub manager was hoping to get the stove going soon as the pub could do with the extra heat. Unfortunately when I inspected the installation it became clear that it was connected to the wrong type of twinwall, it was connected to a gas or oil twinwall instead of a solid fuel twinwall. Also the pipe passed too close to some plaster board which is a combustible material. The stove will need to be re-installed correctly before it can be used.

dodgy install