The Facts About Fireplace Structures

By Tracy T. Parrish


The fireplace is a construction that holds fire for the purpose of heating, cooking or ambience. The fire is held within the firepit or firebox. Gas and exhaust is let out through the flue or chimney of the structure. The mantel of a fireplace serves to hold decorations.

There are several components to these structures. Some include: damper, smoke chamber, crown, cap, shroud, throat, flue, overmantel, lintel, lintel bar, chimney breast, hearth, chimney crane, ash dump door, firebox, mantel, chimney chase, spark arrestor, and foundation. The three types of these units include: ventless, manufactured and masonry. Ventless are room-venting units that are fueled using bottled or natural gas or gel. Fireboxes made with sheet metal are used in manufactured units. Chimneys and fireplaces are constructed with brick or stone for masonry units. Masonry and manufactured fireplaces use wood, propane, biomass or natural gas for fuel. The chimney and flue types are: metal-lined, reinforced concrete and tile-lined.

Heating effect refers to radioactive heating that heats nearby objects and surrounding air. There is a misconception that these structures lead to energy efficiency. There are some units that utilize a blower in order to transfer heat through the process of convection. This allows for more heat space and a lower heating load.

A wide range of accessories exists for these structures. Some examples are: fireguards, andirons, log boxes, grates, pellet baskets and firedogs. These instruments assist in cradling fuel and accelerating the burning process. Metal firebacks are used to protect the back area of a fireplace by collecting and reradiating heat. Tending tools may include: bellows, shovels, brushes tool stands and pokers.

Another accessory that is becoming increasingly popular is the tubular grate heater. This accessory is said to increase the efficiency of a fireplace. Certain tubular metal heat exchangers, heated by coals or fire, draw in cold air and blow out heated air. This structure may also be called a fireplace grate heater, blower, heatilator or hearth heater.

Ancient structures were built into the floor in the middle of a dwelling. Smoke was blown outside through holes in the roof or blown into the room. This problem was corrected by the invention of the chimney. During the 18th century, the development of the tall or shallow firebox by Count Rumford and the convection chamber by Ben Franklin changed these devices.

Modern homes do not have open fireplaces. Instead, they use more efficient devices such as central heating or electronic heaters. There are new devices designed to add the ambience of fireplaces without the actual structures.




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