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[12] [10] This initial expense must be weighed against the long-term benefits of a central vacuum, including the typical longer service life of the equipment, and negligible consumables cost if a filterless system is chosen. A central vacuum system is generally considered by building owners a permanent fixture of the building where it is ...
David T. Kenney (April 3, 1866 – May 26?, 1922) was an inventor with nine patents, granted between 1903 and 1913, applicable to both machine-driven and manual vacuum cleaners, dominated the vacuum cleaner industry in the United States until the 1920s.
ADI's inventory includes products such as video surveillance, building access control, home intrusion, fire safety, and alarm systems as well as professional and residential audio/video (AV) equipment such as commercial speakers and video displays, networking equipment, data communications solutions, tools, wire, cabling, and more. [2]
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In low-lying communities, wastewater is often conveyed by vacuum sewer. Pipelines range in size from pipes of 125 millimetres (4.9 in) in diameter up to 280 millimetres (11 in) in diameter. Vacuum sewer systems use differential atmospheric pressure to move the liquid to a central vacuum station. [10]
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