Like forwarding your mail, email forwards are used to send a message from person to person through an intermediary. Here is an example:

The fireplace is feature within a building that is intended to contain fire for heating and occasionally for cooking. They can house electric fires, fuel fires or some other source of heating. The fire itself is usually contained within a firebox or a small pit, and a chimney or similar system is used to allow the exhaust to escape. Historically fireplaces are a central feature within the house, although this is now less common.

The actual fires themselves may be powered in a variety of ways. Wood is the most ancient of fuels and was probably the first to be used as a source of heat. Peat was often used in place of wood because it lasted longer and could burn more efficiently. Coal fires became more popular around the time of the industrial revolution. The electric fire followed the development of the electric current and became very popular in the’30s. In more recent years, bio-fuels and propane have become more widely used.

Old fireplaces are sometimes kept as design features. They may not necessarily have the heating system they were built with. They may have been replaced with a modern system. An electric heater is sometimes installed to provide heat without the fire. Most are just left empty and are used simply for decoration.

A fireplace may use some or all of these components: a hearth, a foundation, a fireplace mantel, a chimney crane, a cap, a smoke chamber, a firebox, an ash-dump door, a lintel, a chimney breast, a cleanout door, over-mantel, a throat, a flue, a damper, a chimney chase, a spark arrestor, a crown, or a shroud.

There are a few different fireplace designs. A masonry fireplace is fashioned from stone or more commonly bricks. Reinforced concrete used to be popular until the fundamental flaw became evident. As the concrete expands at a different rate to the metal reinforcement many reinforced concrete fireplaces cracked and warped structures.

Manufactured fireplaces use a prefabricated design and so are popular with new builds. These usually consist of a metal firebox linked to a metal pipe that acts as a chimney to vent exhaust. Because of its metal structure it is prone to sparking, so spark arresters are usually included. Wood, natural gas and propane are appropriate fuel sources for this kind of fire system.

Duct Free fireplaces are fueled by gel, LP/bottled gas or natural gas. They are quite easy to install and do not use the same BTUs as other fireplaces. Many states and countries have special regulations regarding these fireplaces. Some of the fireplaces can burn to almost one hundred percent efficiency. However, they have been known to release a large amount of moisture into the surrounding air.

A bio-ethanol fireplace is sometimes referred to as a flue-less fire. This is because it does not need any kind of exhaust ventilation. They are therefore 100% efficient because at keeping all the heat in the room. They are more often than not powered by bio-fuel and unlike some other fireplaces there is no soot whatsoever produced by these fires. It only produces water and low amounts of carbon monoxide and carbon dioxide.

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