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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 walk inside, or in extreme cases have a small meeting using built-in benches inside. An example of the latter oversize construction can be found in the great hall of Muchalls Castle in Scotland.
Standard, modern, wood-burning masonry fireplaces though have an efficiency rating of at least 80% (legal minimum requirement, for example, in Salzburg, Austria). [11] To improve efficiency, fireplaces can also be modified by inserting special heavy fireboxes designed to burn much cleaner and can reach efficiencies as high as 80% in heating the ...
The design of the direct vent fireplace allows for such a high level of efficiency because of the sealed firebox. The sealed firebox only allows combustion gasses to leave the system and exit the building. Since it is sealed, no warm air from the room is able to be drawn into the firebox and expelled out of the building. [8]
A masonry heater is defined by ASTM International as a "vented heating system of predominantly masonry construction having a mass of at least 800 kg (1,760 lb), excluding the chimney and masonry heater base. In particular, a masonry heater is designed specifically to capture and store a substantial portion of the heat from a solid fuel fire in ...
A flue liner is a secondary barrier in a chimney that protects the masonry from the acidic products of combustion, helps prevent flue gas from entering the house, and reduces the size of an oversized flue. Since the 1950s, building codes in many locations require newly built chimneys to have a flue liner.
An outdoor fireplace is a place for building fires outside of the home. Similar in construction to an indoor fireplace, an outdoor fireplace is usually added to a stone, brick, or concrete patio. It often consists of a firebox and a chimney. The firebox is typically constructed with a smoke shelve incorporated although straight firebox designs ...
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