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  2. HVAC control system - Wikipedia

    en.wikipedia.org/wiki/HVAC_control_system

    HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system to regulate the operation of a heating and/or air conditioning system. [1] Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state. Then the control system draws a conclusion what action has to be taken (e.g. start the ...

  3. Sleeve (construction) - Wikipedia

    en.wikipedia.org/wiki/Sleeve_(construction)

    A general practice is to size the sleeve two NPS (pipe sizes) up from the diameter of the penetrant. For example, a 4" pipe, with 1" of thermal insulation makes a 6" penetrant (1" pipe covering on each side of the pipe), plus two pipe sizes = an 8" sleeve, creating a 1" annulus.

  4. Attic fan - Wikipedia

    en.wikipedia.org/wiki/Attic_fan

    An attic fan installed underneath a roof. A powered attic ventilator, or attic fan, is a ventilation fan that regulates the heat level of a building's attic by exhausting hot air. A thermostat is used to automatically turn the fan off and on, while sometimes a manual switch is used. An attic fan can be gable mounted or roof mounted. Additional ...

  5. Sleeve valve - Wikipedia

    en.wikipedia.org/wiki/Sleeve_valve

    Sleeve valve closeup from a Bristol Centaurus Mark 175. Bristol Perseus. The sleeve valve is a type of valve mechanism for piston engines, distinct from the usual poppet valve. Sleeve valve engines saw use in a number of pre–World War II luxury cars and in the United States in the Willys-Knight car and light truck. They subsequently fell from ...

  6. Attic - Wikipedia

    en.wikipedia.org/wiki/Attic

    The word "attic" is derived from the Attica region of Greece and comes from Attic style architecture. The term referred to "a low decorative façade above the main story of a building" and, as used in the phrase "attic order", [3] had originally indicated a small decorative column above a building's main façade.

  7. Man in the Attic - Wikipedia

    en.wikipedia.org/wiki/Man_in_the_Attic

    Man in the Attic is a 1953 American horror film directed by Hugo Fregonese and starring Jack Palance, Constance Smith and Byron Palmer. [ 1 ] [ 2 ] The screenplay was by Barré Lyndon and Robert Presnell Jr. based on the 1913 novel The Lodger by Marie Belloc Lowndes which fictionalizes the Jack the Ripper killings.

  8. Attic (architecture) - Wikipedia

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

    Attic. In classical architecture, the term attic refers to a storey (or low wall) above the cornice of a classical façade.The decoration of the topmost part of a building was particularly important in ancient Greek architecture and this came to be seen as typifying the Attica style, [citation needed] the earliest example known being that of the monument of Thrasyllus in Athens.

  9. Windsock - Wikipedia

    en.wikipedia.org/wiki/Windsock

    A windsock (a wind cone or wind sleeve) is a conical textile tube that resembles a giant sock. It can be used as a basic indicator of wind speed and direction, or as decoration. Windsocks are typically used at airports to show the direction and strength of the wind to pilots, and at chemical plants where there is risk of gaseous leakage.

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