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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 ...
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Both of these systems make use variable refrigerant flow technology, with high-efficiency variable-speed DC motors and compressors to require very little run power, and both also offer heat in addition to air conditioning. A third type of unit is available for larger, usually commercial, buildings and offers both grid and battery backup as well ...
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The 1993 World Trade Center bombing was a terrorist attack carried out by Ramzi Yousef and associates against the United States on February 26, 1993, when a van bomb detonated below the North Tower of the World Trade Center complex in Manhattan, New York City.
Front cover contents may usually be: For novels, the novel title in large letters, author name, tagline and symbol of publisher (in corner) Back cover (also called 'lower cover') contents may usually be: For novels, a back cover text or teaser that gives a hint of the story in an attractive way. A picture of the writer. A summary