How far above the fireplace opening should the fireplace throat or damper be located?

The proper location of the fireplace throat or damper is typically recommended to be 8 inches above the fireplace opening. This distance is essential for ensuring that smoke and combustion gases are effectively channeled up the flue without the risk of obstruction. Placing the throat too low can lead to poor drafting and the potential for smoke to enter the living space, which is detrimental to safety and comfort. This height also helps promote better airflow dynamics, allowing for more efficient burning and reducing the likelihood of creosote buildup in the chimney.

In contrast, specifying a throat height that is too low may not provide adequate clearance for smoke and gases, while a height that is too high may create unnecessary resistance in the chimney system, both situations compromising the efficiency of the fireplace. Thus, the 8-inch guideline is grounded in best practices that prioritize safety and performance in chimney and fireplace systems.