I bought my house in December and am just now getting to poke around. I have
two fireplaces -- a smaller one with a rectangular flue and damper that
fully closes and appears to seal very well.
The larger fireplace (48"W x 32"H) has a round flue and damper that has a
threaded "adjustment rod" that will not let the damper close. As set
currently, it only allows the damper to be set at about a 45 degree angle. I
had a $140 natural gas bill last month (in Southern California) and am
thinking that I probably am trying to heat Palos Verdes with hot air
escaping out my flue.
Both fireplaces have glass doors that fit quite well, but I can feel the
draft from the flue on the larger fireplace when the damper is closed as far
as the adjustment rod permits (again, open it is at 90 degrees and closed it
is about 45 degrees).
The thing that puzzles me is that the rod does not look like it can be
adjusted down any more than its current position.
Any reason why the damper would be adjusted so it cannot close? (this is my
first experiences with owning fireplaces). I am thinking about just removing
the adjustment rod so that the flue can fully close, but I do not want to
violate code or cause a fire, etc.