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  2. Ground-coupled heat exchanger - Wikipedia

    en.wikipedia.org/wiki/Ground-coupled_heat_exchanger

    A qanat and windcatcher used as an earth duct, for both earth coupling and evaporative cooling. No fan is needed; the suction in the lee of the windtower draws the air up and out. A ground-coupled heat exchanger is an underground heat exchanger that can capture heat from and/or dissipate heat to the ground. They use the Earth's near constant ...

  3. Fire alarm call box - Wikipedia

    en.wikipedia.org/wiki/Fire_alarm_call_box

    Fire alarm call box. A fire alarm box, fire alarm call box, or fire alarm pull box is a device used for notifying a fire department of a fire or a fire alarm activation. Typically installed on street corners or on the outside of commercial buildings in urban areas, they were the main means of summoning firefighters before the general ...

  4. Manual fire alarm activation - Wikipedia

    en.wikipedia.org/wiki/Manual_fire_alarm_activation

    Manual fire alarm activation. An activated manual call point in Japan. Telephone jacks are visible beneath the open cover. Manual fire alarm activation is the process of triggering a fire alarm through a call point, pull station, or other device. This usually causes the alarm to sound the evacuation signal for the relevant building or zone.

  5. Electrical conduit - Wikipedia

    en.wikipedia.org/wiki/Electrical_conduit

    Box connectors join conduit to a junction box or other electrical box. A typical box connector is inserted into a knockout in a junction box, with the threaded end then being secured with a ring (called a lock nut ) from within the box, as a bolt would be secured by a nut.

  6. Passive ventilation - Wikipedia

    en.wikipedia.org/wiki/Passive_ventilation

    Passive ventilation is the process of supplying air to and removing air from an indoor space without using mechanical systems. It refers to the flow of external air to an indoor space as a result of pressure differences arising from natural forces. There are two types of natural ventilation occurring in buildings: wind driven ventilation and ...

  7. Underground power line - Wikipedia

    en.wikipedia.org/wiki/Underground_power_line

    An underground power line provides electrical power with underground cables. Compared to overhead power lines, underground lines have lower risk of starting a wildfire and reduce the risk of the electrical supply being interrupted by outages during high winds, thunderstorms or heavy snow or ice storms. An added benefit of undergrounding is the ...

  8. Platform screen doors - Wikipedia

    en.wikipedia.org/wiki/Platform_screen_doors

    Platform screen doors are also used in all underground stations of the Chennai Metro. [57] There are platform screen doors in all elevated stations of Kolkata Metro Line 2. Platform screen doors will be introduced in underground stations of Kolkata Metro Line 2, Kolkata Metro Line 3, Kolkata Metro Line 6.

  9. TV-Lift - Wikipedia

    en.wikipedia.org/wiki/TV-Lift

    TV-Lift. A Television-lift, TV-lift for short, or also TV lifting system, is an electrically powered mechanical system which lifts or moves televisions vertically or horizontally out of furniture, ceilings or partition walls. The main reason for using a TV lift system is in order to integrate a television into the existing interior design of a ...

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