Here is what I got out of my 18' of chimney after 6 weeks of rather steady burning. I would like less but I am not displeased considering the stove. My wood is 90+% great with a couple splits that sizzle a bit. Most has been seasoned two years or more. Stove is a VC Defiant.
First year with the stove and I cleaned after 2, 4 and now 6 weeks. Looks worse in the photos than it really is but there is some crud build up. Most of the pipe is just grey/brown dusty stuff but at the cap I always get the black shiny bad stuff. I clean from the bottom up and bang on the cap a bit to shake some of the bad stuff loose before I pull the brush back down. Here are some photos of my cleanout.
Stove
Before
After
Results
First year with the stove and I cleaned after 2, 4 and now 6 weeks. Looks worse in the photos than it really is but there is some crud build up. Most of the pipe is just grey/brown dusty stuff but at the cap I always get the black shiny bad stuff. I clean from the bottom up and bang on the cap a bit to shake some of the bad stuff loose before I pull the brush back down. Here are some photos of my cleanout.
Stove
Before
After
Results