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  2. Displacement ventilation - Wikipedia

    en.wikipedia.org/wiki/Displacement_ventilation

    Displacement ventilation is best suited for taller spaces (higher than 3 meters [10 feet]). [2] Standard mixing ventilation may be better suited for smaller spaces where air quality is not as great a concern, such as single-occupant offices, and where the room height is not tall (e.g., lower than 2.3 meters [7.5 feet]).

  3. Underfloor air distribution - Wikipedia

    en.wikipedia.org/wiki/Underfloor_air_distribution

    UFAD systems use an underfloor supply plenum located between the structural concrete slab and a raised floor system to supply conditioned air to supply outlets (usually floor diffusers), located at or near floor level within the occupied space. Air returns from the room at ceiling level or the maximum allowable height above the occupied zone.

  4. Duct (flow) - Wikipedia

    en.wikipedia.org/wiki/Duct_(flow)

    Downstream of the air handler, the supply air trunk duct will commonly fork, providing air to many individual air outlets such as diffusers, grilles, and registers. When the system is designed with a main duct branching into many subsidiary branch ducts, fittings called take-offs allow a small portion of the flow in the main duct to be diverted ...

  5. US homebuilder confidence at 7-month high in November, survey ...

    www.aol.com/news/us-homebuilder-confidence-7...

    NAHB Chief Economist Robert Dietz also said that despite the improved sentiment, the industry still faces headwinds from labor shortages, a limited supply of building lots and elevated materials ...

  6. Room air distribution - Wikipedia

    en.wikipedia.org/wiki/Room_air_distribution

    Displacement ventilation systems supply air directly to the occupied zone.The air is supplied at low velocities to cause minimal induction and mixing. This system is used for ventilation and cooling of large high spaces, such as auditorium and atria, where energy may be saved if only the occupied zone is treated rather than trying to control the conditions in the entire space.

  7. Iron-fisted Assad never quelled the Syrian rebels who came ...

    www.aol.com/news/iron-fisted-assad-never-quelled...

    President for 24 years, Assad flew out of Damascus for an unknown destination early on Sunday, two senior army officers told Reuters. Rebels declared the city "free of the tyrant Bashar al-Assad".

  8. Titans coach Brian Callahan torches refs after penalty on ...

    www.aol.com/sports/titans-coach-brian-callahan...

    The Tennessee Titans came up with a fourth-down stop in the end zone in Sunday's 23-13 loss to the Minnesota Vikings that appeared to halt a Vikings scoring drive.

  9. Diffuser (thermodynamics) - Wikipedia

    en.wikipedia.org/wiki/Diffuser_(thermodynamics)

    A round diffuser in an HVAC system. Diffusers are very common in heating, ventilating, and air-conditioning systems. [3] Diffusers are used in both all-air and air-water HVAC systems, as part of room air distribution subsystems, and serve several purposes: To deliver both conditioning and ventilating air

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