Last year I installed a new PE Pacific insert. Stainlss steel liner and all. Has been the best investment I can think of. One thing I have noticed. I very rarely ever see any smoke coming from the chimmney. Roaring fire, house is toasty, no smoke outside. I guess I never really thought of it until I passed my in-laws today and it looked like a fog zone from there chimmney. I do see smoke of course as I start a new fire. Then I see it and can smell the work burning. After awhile nothing. Just curious.