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A damper is a valve or plate that stops or regulates the flow of air inside a duct, chimney, VAV box, air handler, or other air-handling equipment. A damper may be used to cut off central air conditioning (heating or cooling) to an unused room, or to regulate it for room-by-room temperature and climate control - for example, in the case of ...
Central, "all-air" air-conditioning systems (or package systems) with a combined outdoor condenser/evaporator unit are often installed in North American residences, offices, and public buildings, but are difficult to retrofit (install in a building that was not designed to receive it) because of the bulky air ducts required. [32] (Minisplit ...
Where two voltages are given below separated by "/", the first is the root-mean-square voltage between a phase and the neutral connector, whereas the second is the corresponding root-mean-square voltage between two phases (exception: the category shown below called "One Phase", where 240 V is the root-mean-square voltage between the two legs of a split phase).
Three people, of which two were police officers and one a firefighter, were injured when a garbage truck exploded in a Chicago suburb last Friday.. The police officers and firefighter were ...
Latino men vaulted into the spotlight with their greater-than-expected support for President-elect Donald Trump.Soon, they’ll be looking for returns on their votes. U.S. Hispanics, who are ...
French President Emmanuel Macron said on Monday that U.S. Joe Biden's administration made a "good decision" by allowing Ukraine the use of U.S.-made weapons to strike inside Russia. In the ...
[1] [2] SVCs are part of the flexible AC transmission system [3] [4] device family, regulating voltage, power factor, harmonics and stabilizing the system. A static VAR compensator has no significant moving parts (other than internal switchgear).
Telematics car insurance programs offer discounts up to 40% for letting insurers monitor your driving habits through a plug-in device or smartphone app, but the savings come with important privacy ...