Well I ordered one of those drill powered brush kits. My boiler chimney (6” diameter by 3/16” thick stainless liner welded at seams) inside of clay chimney has never been cleaned but needs it now. I’m gone this week for work so once I load it Tuesday morning I’ll let it go out and then I can clean the pipe Saturday as well as empty all of the ashes.
The house is 38 years old but this is the first time wood has been used primarily. It was always the backup heat source prior so maybe has a year of so if cumulative use prior to this.