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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 conical hose-stream aimed around an opening—of a window or door, etc.—entrains smoke and thus increases the exhaust rate of smoke from the space. This is a process called hydraulic ventilation. This strategy might be used when the fire is small and protecting property from smoke damage can be achieved safely.
A Knox Box can cut fire losses for building owners since firefighters can enter buildings without breaking doors or windows. It can also reduce the potential of a firefighter being injured forcing entry. The disadvantage of the system is that it provides a single point of failure for the security of many buildings. If the key to a district's ...
Natural ventilation is the intentional passive flow of outdoor air into a building through planned openings (such as louvers, doors, and windows). Natural ventilation does not require mechanical systems to move outdoor air. Instead, it relies entirely on passive physical phenomena, such as wind pressure, or the stack effect. Natural ventilation ...
Some fire doors are equipped with integral windows which also have a rating, or have been incorporated at the time of the door test and be subject to the overall door's product certification. Fire-resistive windows must remain intact under fire conditions and hose stream impact resistance, and can include: Wire mesh glass - usually Georgian wired
Fireplace in the Colonel McNeal House showing coal grated firebox and mirror above. A firebox or firepit is the part of the fireplace where fuel is combusted, in distinction from 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.