I about have my installation complete, I have my chimney done and am now starting in on the stove, I bought all this stuff used and have nver had a wood-burner, although most of my family have had fireplaces, so mine is a little different, and doing some learning on the fly. My question is this: the setup I have has one of those "Barometric draft controls" on it with the counterweights that I guess must control the draft it automaticly? should there also be something to shut the flue down when not in use to keep the cold air from coming down the chimney? the chimney is about 22 feet high. thanks in advance.