What is the area located above the damper on the front smoke chamber wall of a masonry fireplace called?

The area located above the damper on the front smoke chamber wall of a masonry fireplace is referred to as the breast. The breast is the section of the fireplace that forms the outer wall above the smoke chamber and below the flue. It plays an important role in the structure of the fireplace, helping to support the chimney and allowing smoke to travel up into the flue system.

This area is essential for the proper functioning of the fireplace, as it helps in directing smoke and gases efficiently out of the living space. The construction and design of the breast can influence the performance of the fireplace, including factors such as fuel efficiency and the safety of emissions from combustion. Understanding this feature is crucial for anyone involved in chimney maintenance or construction, as it ensures both optimal performance and compliance with safety standards.