When you do open the flue after a closed period, you might hear a small pop or creak. That’s the metal expanding or the damper shifting into place.
It’s a reassuring sound—like a kettle’s first whistle. Embrace it. It’s the house saying, “I’m ready for you.”
If you hear nothing but silence and the room fills with smoke, abort mission immediately. Open a window and try again in five minutes.
Ratio Of Fireplace Opening To Flue at Carole Alden blog
