Chimney & Heat Shield Set for Harvia M3 (Out the Top)The Harvia steel chimney is an easy to install stylish chimney solution. The steel chimney withstands extensive changes in temperature and has mainly been designed for use with woodburning stoves, smaller fireplaces, and iron stoves in detached sauna buildings. Harvia has designed a long lasting and safe heat shield. If the sauna walls are made of wood or some other inflammable material the safety distance of the heater can be made considerably