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  2. Industrial fan - Wikipedia

    en.wikipedia.org/wiki/Industrial_fan

    Industrial fans and blowers are machines whose primary function is to provide and accommodate a large flow of air or gas to various parts of a building or other structures. This is achieved by rotating a number of blades, connected to a hub and shaft, and driven by a motor or turbine .

  3. Xcel Energy Cabin Creek fire - Wikipedia

    en.wikipedia.org/wiki/Xcel_Energy_Cabin_Creek_Fire

    In 2000, a Federal Energy Regulatory Commission-initiated inspection of the penstock (a long, sloping tunnel and confined space running nearly 3/4 of a mile) found that the epoxy lining on the interior of the pipes was deteriorating. This was leading to damage of the pipes themselves and Xcel was mandated to repair the epoxy to limit further ...

  4. Fan (machine) - Wikipedia

    en.wikipedia.org/wiki/Fan_(machine)

    In 1909, KDK of Japan pioneered the invention of mass-produced electric fans for home use. In the 1920s, industrial advances allowed steel fans to be mass-produced in different shapes, bringing fan prices down and allowing more homeowners to afford them. In the 1930s, the first art deco fan (the "Silver Swan") was designed by Emerson. [11]

  5. Confined space - Wikipedia

    en.wikipedia.org/wiki/Confined_space

    A confined space is a space with limited entry and egress and not suitable for human inhabitants. Alternative names for a confined space are enclosed space and dangerous space. [1] An example is the interior of a storage tank, occasionally entered by maintenance workers but not intended for human occupancy.

  6. Central heating - Wikipedia

    en.wikipedia.org/wiki/Central_heating

    Electric heaters are usually part of a fan coil which is part of a central air conditioner. They circulate heat by blowing air across the heating element which is supplied to the furnace through return air ducts. Blowers in electric furnaces move air over one to five resistance coils or elements which are usually rated at five kilowatts.

  7. Electric machine - Wikipedia

    en.wikipedia.org/wiki/Electric_machine

    Electric motors are found in applications as diverse as industrial fans, blowers and pumps, machine tools, household appliances, power tools, and disk drives. They may be powered by direct current or by alternating current which leads to the two main classifications: AC motors and DC motors .

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