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  2. Drain-waste-vent system - Wikipedia

    en.wikipedia.org/wiki/Drain-waste-vent_system

    In the U.S., every plumbing fixture must also be coupled to the system's vent piping. [1] Without a vent, negative pressure can slow the flow of water leaving the system, resulting in clogs, or cause siphonage to empty a trap. The high point of the vent system (the top of its "soil stack") must be open to the exterior at atmospheric pressure.

  3. Windcatcher - Wikipedia

    en.wikipedia.org/wiki/Windcatcher

    In the center, a shuksheika (roof lantern vent), used to shade the qa'a below while allowing hot air rise out of it. [ 16 ] The windcatcher can function in two ways: directing airflow using the pressure of wind blowing into the windcatcher, or directing airflow using buoyancy forces from temperature gradients ( stack effect ).

  4. Carport - Wikipedia

    en.wikipedia.org/wiki/Carport

    Carport in front of garages One example of the many common types of modern carports sold on the market. This particular one is a stand-alone model. Carport in Japan. A carport is a covered structure used to offer limited protection to vehicles, primarily cars, from rain and snow. The structure can either be free standing or attached to a wall.

  5. 12×12 - Wikipedia

    en.wikipedia.org/wiki/12×12

    12x12 may refer to: 12×12=144, a common times tables size in the English-speaking world; Twelve wheel drive (12x12), a vehicle configuration with 12 wheels, all of them drive wheels; Twelve Steps and Twelve Traditions a book published by Alcoholics Anonymous World Services; 12"x12 New Order Vinyl Campaign, a series of 12 12-inch single ...

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