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The design of an effective kitchen ventilation system is determined by: The kitchen's workload; The amount, type and power of cooking equipment; The kitchen's layout and shape; The number of kitchen staff; The need for easy cleaning and maintenance; Energy efficiency; Hot air from cooking is usually vented externally through a chimney system.
A kitchen hood in a small apartment. A kitchen hood, exhaust hood, hood fan, extractor hood, or range hood is a device containing a mechanical fan that hangs above the stove or cooktop in the kitchen. It removes airborne grease, combustion products, fumes, smoke, heat, and steam from the air by evacuation of the air and filtration. [1]
Combining two flows into chimney: A t +A f <A, where A t =7.1 inch 2 is the minimum required flow area from water heater tank and A f =19.6 inch 2 is the minimum flow area from a furnace of a central heating system.
A seven-flue chimney in a four-storey Georgian house in London, showing alternative methods of sweeping. A flue is a duct, pipe, or opening in a chimney for conveying exhaust gases from a fireplace, furnace, water heater, boiler, or generator to the outdoors. Historically the term flue meant the chimney itself. [1]
Some early approaches to the problem were adaptations of the conventional chimney. [1] A hearth constructed by Thomas Jefferson in 1822–1826 at the University of Virginia was equipped with a sand bath and special flues to vent toxic gases. [2] The draft of a chimney was also used by Thomas Edison to provide ventilation in his work around the ...
A cap, hood, or shroud serves to keep rainwater out of the exterior of the chimney; rain in the chimney is a much greater problem in chimneys lined with impervious flue tiles or metal liners than with the traditional masonry chimney, which soaks up all but the most violent rain. Some chimneys have a spark arrestor incorporated into the crown or ...
As with any other element of a building's passive fire protection system, smoke dampers need to be maintained, inspected and repaired to ensure they are in working order. The National Fire Protection Association (NFPA) requires the testing, maintenance and repair of smoke dampers as mandated in the Life Safety Code. NFPA 105 states [that] each ...
[29] In a DCV system, CO 2 sensors control the amount of ventilation. [30] [31] During peak occupancy, CO 2 levels rise, and the system adjusts to deliver the same amount of outdoor air as would be used by the ventilation-rate procedure. [32] However, when spaces are less occupied, CO 2 levels reduce, and the system reduces ventilation to ...