Been using my grandpa now for a year. Awesome stove, lots of creosote. I know my problem is slow burning but thats what I need to do due to our work schedules.I have no problem with cleaning the chimney and thats what I do on a regular basis. I'm venting into a designated 7in masonry chimney from the basement in a ranch home. Would I benefit from installing a liner? I realize my problem is low temp but a liner I'm assumimg would have to be 6in so I'm reducing the exhaust from the stove by 2in. Any thoughts? Thanks, Dave