What is one purpose of an opened damper door?

One purpose of an opened damper door is to prevent downdraft from pushing smoke into the room. When a fireplace or wood-burning stove is in use, an open damper allows smoke and gases to rise up the flue and exit the home. If the damper is closed when the fire is lit, or if there is a downdraft due to wind conditions, smoke can be forced back into the living area, creating a hazardous situation. By ensuring that the damper is opened, it not only facilitates the effective exit of smoke but also protects the indoor air quality and safety of the occupants. Maintaining this function of the damper is crucial, especially in areas where chimney systems might be affected by varying wind patterns.