F

Fireback - A piece of heavy cast iron, sized in proportion to the fireplace and the fire, which is placed against the back wall of the fireplace. Firebacks serve two main purposes; protect the back wall from damage that may be used by fireplace tools during use and to reflect heat back out into the room.

Firebox - Chamber of a fireplace or stove where the fire actually burns.

Firebrick - Brick composed of clay and silica and designed to withstand high temperatures such as those found in a firebox.

Fireplace - A place for a domestic fire, especially a grate or hearth at the base of a chimney.

Fireplace Grate - A frame of steel or cast iron bars for holding fuel when burning, as in a fireplace or stove. It provides a safe and secure foundation upon which the fire burns. The grate is positioned roughly in the center of the firebox and filters falling ash from the burning fire above, improves the quality of the flames produced and increases the heat output.

Fireplace Insert - Wood, coal, pellet, or gas heating appliances that fit inside an existing fireplace.

Flashing - Sheet metal or other materials used in waterproofing roof valleys or the angle between a chimney and a roof.

Flue - The passage in a chimney for conveying flue gases to the outside atmosphere.

Flue Collar - The flue collar is the round, metal opening designed for connecting vent piping. Any appliance that requires venting, including stoves and furnaces, has a flue collar where gases and smoke leave the appliance and enter the chimney flue. It is usually composed of metal and may appear on the top or on the back of the appliance. Some flue collars are designed to connect chimney inserts or stoves to the chimney.

Flue Liner - Special liner required by codes and standards to cover the inner surface of the flue. The liner serves as a buffer between flue gases and chimney walls and is designed to contain the products of combustion.

Flue Tile - A rectangular, square or round section of terra-cotta (clay) tube. Masonry chimneys have sections of clay flue tiles stacked one on top of the other to form a liner called the flue.