It is not unusual for a wood stove's flue pipe to emit a little bit of smoke when you open the doors, especially if the fire is still burning and producing smoke. When you open the stove doors, you create an opening for the smoke to escape, and some of it may find its way out through the flue pipe.
However, when you close the doors, the stove becomes a closed system, and the smoke is directed up the flue pipe and out of your home. The negative pressure inside the stove caused by the chimney's natural draft helps to ensure that the smoke goes up and out, rather than leaking into the room.
If you are experiencing a significant amount of smoke leakage even when the doors are closed, it could indicate a problem with your wood stove or flue pipe. Possible issues could include improper installation, a blockage in the flue pipe, or a faulty seal on the stove doors. In such cases, it's important to have a professional inspect and address the problem to ensure the safe and efficient operation of your wood stove.
Regular maintenance and cleaning of your wood stove and flue pipe are essential to prevent potential issues and ensure it operates optimally. It's always best to follow the manufacturer's guidelines for maintenance and seek professional help if you encounter any concerns or problems with your wood stove.