So I bought a house not too long ago and with it came a Vigilant (1977 stamp) that was setup with inadequate heat shielding so we're moving it slightly and building a new surround/hearth. In looking into things I discovered that the stove calls for an 8" pipe/flue and the chimney is a 6 inch. The chimney is in the center of the house and looks like it would draft pretty well, going through 2.5 floors and ending above the roof ridge line. The stove has been used for years this way, but I'm worried that we'll be cleaning the chimney constantly or have to run the stove at below capacity. Does anyone have a similar experience and should I be very concerned? Do chimney liners generally improve the drafting of an older chimney? Thanks!