As I turn up the air to char the last load for the night the stove realy "tings" and "pops". I don't notice it that often durring the rest of the day, probably due to all the other sounds in the house. Then as I close the air down for the night more "tings" and "pops" and even a few "creaks". Is this common with all new tighter cast stoves? Could be the new house is just so quiet I hear it more.