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The history of electric light is well documented, [11] and with the developments in lighting technology the profession of lighting developed alongside it. The development of high-efficiency, low-cost fluorescent lamps led to a reliance on electric light and a uniform blanket approach to lighting, but the energy crisis of the 1970s required more design consideration and reinvigorated the use of ...
An important property of light fixtures is the luminous efficacy or wall-plug efficiency, meaning the amount of usable light emanating from the fixture per used energy, usually measured in lumen per watt. A fixture using replaceable light sources can also have its efficiency quoted as the percentage of light passed from the "bulb" to the ...
Chimney breast—The part of the chimney which projects into a room to accommodate a fireplace. [21] Crane—Metal arms mounted on pintles, which swing and hold pots above a fire. Damper—A metal door to close a flue when a fireplace is not in use. Flue—The passageway in the chimney. [21] Hearth—The floor of a fireplace.
Terrazzo is a composite material, poured in place or precast, which is used for floor and wall treatments. It consists of chips of marble, quartz, granite, glass, or other suitable material, poured with a cementitious binder (for chemical binding), polymeric (for physical binding), or a combination of both. Metal strips often divide sections ...
Electric fireplaces are often placed in conventional fireplaces, which can then no longer be used for conventional fires. [1] They plug into the wall, and can run on a "flame only" setting, or can be used as a heater, typically consuming 1.4 to 1.6 kW to heat a 40 m 2 room.
Wolf Steel Ltd., better known as Napoleon, is the largest privately-owned manufacturer of fireplaces, grills, and gas furnaces in North America. [2] Based in Barrie, Ontario, Napoleon began in 1976 as a steel fabrication business under the name Wolf Steel Ltd. In 1995, Napoleon was founded after the company diversified its production to include ...
Quartz is, therefore, classified structurally as a framework silicate mineral and compositionally as an oxide mineral. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. [10] Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation ...
A ceramic heater as a consumer product is a space heater that generates heat using a heating element of ceramic with a positive temperature coefficient (PTC). [1] [2] [failed verification] Ceramic heaters are usually portable and typically used for heating a room or small office, and are of similar utility to metal-element fan heaters.
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