Highbeam
ArboristSite Guru
If you have 19' of straight 6" vertical, I wouldn't think you'd have a problem at all running the King. Like I said though, have most of your load burnt down before you re-load.
That happens with the princess too on a spec chimney. Open the door with fuel in there and you'll get rollout.
Single wall reducer fits right into the collar or did you need an appliance adapter? Then the double wall fits right into the reducer. I bet that looks pretty good since the double wall outside diameter is only slightly smaller than the 8" OD.