I'm thinking I am loosing quite a bit of heat up the chimney flue. This (new to me) old stove is still puzzling me a little. Is there an optimal damper/intake setting for more efficient heat production? I've been trying different things and was wondering if I should try closing the damper ~75%, and start opening the intakes to the point just before smoke comes out. Obviously this is just a trial and error type of thing, but I was sitting here at work and started wondering what the experts do.