Wood Burning Fireplace Flue: Should It Be Closed When Not in Use?

It is recommended to close the flue of a wood-burning fireplace when it is not lit.

Here are a few reasons why:

1. Safety: Keeping the flue closed when the fireplace is not in use helps prevent downdrafts, which can draw smoke and harmful gases back into the room. This is especially important if the fireplace is located in a bedroom or other frequently occupied space.

2. Energy Efficiency: An open flue can allow warm air to escape from the house, leading to increased energy consumption and higher heating bills. Closing the flue helps to keep the warm air inside the house, making it more energy efficient.

3. Prevention of Moisture and Debris: An open flue can allow rain, snow, and debris to enter the fireplace and chimney. This can cause damage to the fireplace and chimney over time, and can also create a safety hazard. Closing the flue helps to keep moisture and debris out, preventing damage and ensuring safe use of the fireplace.

4. Reduced drafts and heat loss: Leaving the flue open when the fireplace is not in use can create a draft that draws warm air out of the room and up the chimney, making the room feel cooler. Keeping the flue closed helps prevent this draft and maintains a more comfortable temperature in the room.