New member here from NE Ohio.First full year burning.I have a Napoleon 1402 insert.The stove is great,heats our small brick ranch well.I'm looking to achieve the best/longest overnight burn that i can.In the manual it says to damper down completely for an extended burn?Ive had people tell me to never close the air flow completely.Any advice on overnight burn techniques would be greatly appreciated.Thanks in advance.Great site