Are there and disadvantages to running stainless steel double wall up the outside of my house, it would b a lot easyer than putting a new linner in my existing brick chimney that has no liner at all. Ive herd it wont draw as good and its more likely to build up creosote, but thats just what ive herd. I c a lota people have done it. What do guys think? Oh and im only planning on living here a few more years and plan on taking the wood furnace and double wall with me.