If you do not close it then you basically have a hole in your roof that is sucking out all the warm air. This will lead to even higher heating and cooling costs.
To properly close a fireplace flue, you should make sure the damper is fully closed and secure. This helps prevent heat loss and drafts when the fireplace is not in use.
the flue should be opened
No. The flue must be open to allow the carbon monoxide to escape from the house.
Yes- but open before use.
When the fire is burning, until the ashes are cold. The damper should be open at these times.
You have to, or the fire is going to burn way too hot and not last very long. Depends on the type of wood you use also.
It needs to be open when lighting a fire. Close it when not in use. If you have any doubt which is which, look up the flue with a flashlight.
When burning the firplace, flue must be open to avoid death/ illness from carbon monoxide.
Is this an insert into a previous wood burning fireplace? Direct vent or vent free? BTUs?
The purpose of the fireplace damper is to keep the outside elements, outside. The damper is opened only when there is a fire in the fireplace.
It is not recommended to close the fireplace flue during a tornado. Doing so can lead to increased pressure inside the house, which may cause structural damage. It is best to keep the flue open to prevent any potential issues.
Burning paper and cardboard can potentially harm the fireplace flue as they produce a large amount of creosote, which can build up and eventually cause a chimney fire. It's recommended to limit burning paper and cardboard to avoid damaging the flue. Regular cleaning and maintenance of the fireplace and flue can help prevent any issues.