Our stove will be used for supplementary heating, at least at first. It seems to me that when the stove isn't in use I'll lose some room heat up the chimney because a low grade draft will form; the room temperature air will rise up the chimney pulling more room temperature air into the stove and up the chimney. Is this heat loss noticeable? Is there a way to make the stove airtight so air from the room won't enter and go up the chimney? Maybe I'm trying to make my house too energy efficient. Thanks for your help. I've learned a ton from you guys.