Firebox

A steel box for installation into a fireplace opening designed to accept a gas fire
Found on http://www.encyclo.co.uk/local/20700

firebox

[n] - a furnace (as on a steam locomotive) in which fuel is burned
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firebox

noun a furnace (as on a steam locomotive) in which fuel is burned
Found on http://wordnetweb.princeton.edu/perl/webwn?s=firebox

Firebox

[architecture] A firebox or firepit is the part of the fireplace where fuel is combusted, in distinction to the hearth, chimney, mantel, overdoor and flue elements of the total fireplace system. The firebox normally sits on a masonry base at the floor level of the room. Some fireboxes are large in proportion so that a person could actually ...
Found on http://en.wikipedia.org/wiki/Firebox_(architecture)

Firebox

[steam engine] In a steam engine, the firebox is the area where the fuel is burned, producing heat to boil the water in the boiler. Most are somewhat box-shaped, hence the name. ==Steam Locomotive Fire Tube Firebox == In the standard steam locomotive firetube type boiler, the firebox is surrounded by water space on five sides. The bottom of...
Found on http://en.wikipedia.org/wiki/Firebox_(steam_engine)

Firebox

In steam railroading, a firebox was a chamber in which a fire would produce sufficient heat to create steam once the hot gases from the firebox were carried into the adjacent boiler via tubes or flues.
Found on http://www.translationdirectory.com/glossaries/glossary256.php
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