Flue Offsets– If a flue must change directions in its path through a chimney, the offset can not be more than the center of the upper portion exceeding the lower flue’s wall. (nfpa211 7.1.2)
Mantel– A decorative shelf added safely above the firebox opening is called the fireplace mantle. It’s one of the most commonly recognizable fireplace features and is one part of the fireplace surround. Mantels must be far enough away from the top of your fire, to avoid overheating.
Smoke Chamber– A pyramid-shaped transition, to provide a seamless passageway between the firebox and the beginning of the fireplace’s chimney liner is called the smoke chamber.
Damper– A fireplace damper is a door or valve used to control the draft of an open fireplace.
Glass or Screen Door– Glass or fireplace screen doors help control the spill of smoke and sparks from the burning flames. The screen or glass doors should be functional and appropriate for the size and type of fireplace you have (and contrary to popular belief are not a one-size-fits-all accessory).
Firebox– A fireplace’s firebox is built of non-combustible/heat rated firebrick and refractory mortars and of adequate dimensions, to have a functional ratio with the flue liner.
