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  2. Ventilation (architecture) - Wikipedia

    en.wikipedia.org/wiki/Ventilation_(architecture)

    For residential buildings, which mostly rely on infiltration for meeting their ventilation needs, a common ventilation rate measure is the air change rate (or air changes per hour): the hourly ventilation rate divided by the volume of the space (I or ACH; units of 1/h). During the winter, ACH may range from 0.50 to 0.41 in a tightly air-sealed ...

  3. Passive ventilation - Wikipedia

    en.wikipedia.org/wiki/Passive_ventilation

    The quality of air it introduces in buildings may be polluted for example due to proximity to an urban or industrial area (although this can also be a factor in wind-driven ventilation) Natural ventilation in buildings can rely mostly on wind pressure differences in windy conditions, but buoyancy effects can a) augment this type of ventilation ...

  4. Heating, ventilation, and air conditioning - Wikipedia

    en.wikipedia.org/wiki/Heating,_ventilation,_and...

    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 ...

  5. Air door - Wikipedia

    en.wikipedia.org/wiki/Air_door

    A typical commercial air curtain enclosure. In North America, the more commonly-used term for an air door is "air curtain". The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) defines an air door as follows: "In its simplest application, an air curtain is a continuous broad stream of air circulated across a doorway of a conditioned space.

  6. Windcatcher - Wikipedia

    en.wikipedia.org/wiki/Windcatcher

    The courtyard air will become stably stratified, the hot air floating on top of the cold air with little mixing. [14]: Ch. 6 The fact that the openings are at the top will trap the cool air below, though it cannot cause the temperature to drop below the nightly minimum temperature.

  7. Airship hangar - Wikipedia

    en.wikipedia.org/wiki/Airship_hangar

    After the Second World War worldwide only one big airship shed had been built: The one in Brand south of Berlin for the construction of the Cargolifter AG airship. With a length of 360 metres (1,180 ft), a width of 210 metres (690 ft) and a height of 107 metres (351 ft), it is one of the largest structures in the world without interior support ...

  8. Cavity wall - Wikipedia

    en.wikipedia.org/wiki/Cavity_wall

    Cavity walls were first used in Greco-Roman buildings, but fell out of use until the 19th century, when they were reintroduced in the United Kingdom, [3] gaining widespread use in the 1920s. [4] In the 20th century metal ties came into use to bind the layers together. Initially cavity widths were narrow and were primarily implemented to reduce ...

  9. Wind power in the Philippines - Wikipedia

    en.wikipedia.org/wiki/Wind_power_in_the_Philippines

    Wind speeds at these areas range from 6.4 meters per second (m/s) to 10.1 m/s, with wind-power-density values of 300 to 1,250 watts per square meter (W/m 2). [ 5 ] When considering only the 'good to excellent' wind resource potential in the country, this accounts for 47 provinces with at least 500MW of wind potential for utility-scale or ...

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