Some direct vent fireplaces can be adapted to vent up and existing masonry chimney, using an adapter kit and a flexible liner, but this will depend on the size of the thimble and total length of the chimney. Your other option to use the factory specific pipe could also be done. What is the size of the thimble and how far would the fireplace be from it? Also, what is the total height of the chimney?
on December 23, 2012