Wood stove, pellet stove and fireplace use are ... These unburned gases condensate on the walls of the chimney liner or flue ...

this is a good introductory project for people wanting to experiment with these stoves. The only materials required are a metal 5 gallon cooking oil drum, a few scrap pieces of chimney liner pipe ...

Without a liner, the chimney is often too wide, uneven, or damaged to work properly — especially with today’s efficient wood stoves, which produce lower flue gas temperatures than open fires.