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  2. Air flow meter - Wikipedia

    en.wikipedia.org/wiki/Air_flow_meter

    An air flow meter is a device similar to an anemometer that measures air flow, i.e. how much air is flowing through a tube. It does not measure the volume of the air passing through the tube, it measures the mass of air flowing through the device per unit time, though Thus air flow meters are simply an application of mass flow meters for the ...

  3. Blower door - Wikipedia

    en.wikipedia.org/wiki/Blower_door

    The manual test consists of adjusting the fan to maintain a series of indoor/outdoor pressure differentials and recording the resulting average fan and indoor/outdoor pressures. Alternatively, a single-point test can be performed, where the blower door fan is ramped up to a reference indoor/outdoor pressure differential and the fan pressure is ...

  4. Duct leakage testing - Wikipedia

    en.wikipedia.org/wiki/Duct_leakage_testing

    CFM25 is defined as the air flow (in cubic feet per minute) needed to create a 25 Pascal pressure change in the ductwork. CFM25 is one of the most basic measurements of ductwork airtightness. A pressure of 25 Pa is equal to 0.1 inches (0.25 cm) of water column.

  5. Fluke Corporation - Wikipedia

    en.wikipedia.org/wiki/Fluke_Corporation

    Fluke Corporation is an American manufacturer of industrial test, measurement, and diagnostic equipment, including electronic test equipment. It was started in 1948 by John Fluke while he was employed at General Electric .

  6. Azerbaijan Airlines plane was downed by Russian air defenses ...

    www.aol.com/azerbaijan-airlines-plane-downed...

    A view shows damages in the wreckage of an Azerbaijan Airlines' Embraer passenger plane that crashed near the city of Aktau, Kazakhstan December 25, 2024 in this screengrab from a video obtained ...

  7. Air handler - Wikipedia

    en.wikipedia.org/wiki/Air_handler

    Air flow control (CAV or VAV air handlers) Zone control (single zone or multi zone air handlers) Fan location (draw-through or blow-through) Direction of outlet air flow (front, up, or down) Package model (horizontal or vertical) But, the first method is very usual in HVAC market. In fact, most of the company advertise their products by air ...

  8. Airflow - Wikipedia

    en.wikipedia.org/wiki/Airflow

    Airflow, or air flow, is the movement of air. Air behaves in a fluid manner, meaning particles naturally flow from areas of higher pressure to those where the pressure is lower. Atmospheric air pressure is directly related to altitude , temperature , and composition.

  9. Actual cubic feet per minute - Wikipedia

    en.wikipedia.org/wiki/Actual_cubic_feet_per_minute

    Actual cubic feet per minute (ACFM) is a unit of volumetric flow. It is commonly used by manufacturers of blowers and compressors. [1] This is the actual gas delivery with reference to inlet conditions, whereas cubic foot per minute (CFM) is an unqualified term and should only be used in general and never accepted as a specific definition without explanation.

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