How to figure out if fireplace damper open or shut. We have a big steel thing hanging down inside fireplace. It can be pushed back and put into a locked position or be pulled forward. We get smoke either way so we assume there is a clogged flue. We still want to know which way is open or closed. Also this may be a fireplace insert, it has it's own chimney that looks like a woodburning stove outside on the roof of house.
