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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 ...
Opening doors and windows are good ways to maximize natural ventilation, which would make the risk of airborne contagion much lower than with costly and maintenance-requiring mechanical systems. Old-fashioned clinical areas with high ceilings and large windows provide the greatest protection.
A chimenea (UK English) [1] or chiminea (US English) [2] (/ ˌ tʃ ɪ m ɪ ˈ n eɪ. ə / CHIM-in-AY-ə; from Spanish chimenea [tʃimeˈnea], in turn derived from French cheminée, "chimney") is a freestanding front-loading fireplace or oven with a bulbous body and usually a vertical smoke vent or chimney.
NFPA 80 allows a maximum door undercut of 3/4 inch, however fire doors are tested with smaller clearances in accordance with NFPA 252. [6] Corridors have a fire rating of one hour or less, and the fire doors in them are required by code to have a fire rating of 1/2 or 1/3 hour, the intent of which is mainly to restrict smoke travel. [7]