The house we moved into has a Forester fireplace insert with a blower. The chimney has no metal liner, (just the original masonry) and looks to be in acceptable condition. The "creosote" seems to be minimal, and it is more of a shiny black than a flaky/ash texture. It cranks out the heat.....that is for sure. I was just wondering if anyone here has an opinion on these old inserts, and if due to the lack of a metal liner......is there anything special I should be doing, or know? Thanks
