Installer coming tomorrow putting 6" round stainless into 8" square clay chimney. He says I won't have my existing clean out anymore, which is 6 feet below the pipe going to chimney. States that is part of my drafting problem because it should be capped off right below the pipe going into the chimney. I asked how do I clean it out and he told me to take the pipe off going from the stove to the chimney, really??? Is this right or he trying to get out of extra work. I can just see me needing to clean it out in zero temps and having to shut the stove down completely to clean it. Thanks for any info and or help.