Improved overall flexibility: since most chimneys need to be built straight up in order to prevent the buildup of creosote, some should be off-set in a very straight line. On the other hand, as a result of the flexibleness of metallic chimneys, they can be set up in almost any https://ricardojjdtl.webbuzzfeed.com/28590698/getting-my-fireplace-inserts-to-work