I am replacding my wood burning stove with a gas insert. I've been told i have third degree creosote in my tile flue, probablay from a flue fire prior to having a SS liner installed. Will be removing the SS liner for the gas insert installation. Will there be a problem with the creosote? None of the gas insert people I've talked to can give me a definite answer. Most just say it shouldn't be a problem as the temperatures in the direct vent liners for the insert won't be hot enouhg to ignite the creosote. I was also told by the sweep that installed the SS liner that there were a few cracked flue tiles from the flue fire as well. Any help will be greatly appreciated.