then helped my friend do his Avalon Astoria. He has a straight through vent and boy, was it dirty! Almost 1/4 of his 4 inch pipe was full of ash. I scooped out as much as I could then took the leaf blower to it. Cool! My pipe was relatively clean but I got a ton of soot and ash from the stove itself. I noticed that my pipe had a creosote like crust on the section of pipe that extended from the house, probably because the cool outside air condensed the gasses. My friends pipe was a light gray fluffy ash that came out easily and left a shiny pipe behind. I also had much more ash in the cleanout T. His was virtually empty. I was pleased at how easy the Astoria was to clean. Little removable panels that allowed me to get everywhere easily. Anywho, we're both all ready for the cold weather.