In this case, the pipe is supported by a bracket at the roof level, and Insulated Chimney Pipe hangs down partially into the room to connect to the stovepipe. The details as to the building of masonry chimneys are beyond the scope of this document, however there are a few safety and performance issue to keep in mind. The sad truth is that some masons spent so many years building low-temperature chimneys for oil burners, gas burners and fireplaces that the art of proper chimney construction has become almost lost. For the proper information on building masonry fireplaces and chimneys go to Jim Buckley's Fireplace pages . Not so fast - some thought processes are required here.
Lets start with the fireplace.
Chimney professionals soon saw that there were a lot of problems with this setup. As a result of these problems, the Hearth Industy and the National Fire Protection Association put together a set of more modern guidelines. First, determine if you have a masonry fireplace and chimney. At the minimum, extend a 5 foot flexible stainless steel tube from your stove or insert up through the damper and into the first flue tile. Using another exisiting chimney Houses with unused chimneys tend to be older homes, as these structures were often built with multiple chimneys for heating, cooking, etc.