Abstract: An airflow measurement device that is configured to measure airflow in an air handling system. The airflow measurement device can include a flow conditioning plate formed with a plurality of plate apertures or holes. A flow sensor is associated with each aperture. The flow sensors can be any type(s) of flow sensors that are suitable for sensing or characterizing one or more aspects of air flowing into and through the apertures, such as pitot sensors, vane anemometers, hot wire anemometers, or the like. The flow sensors can be used to quantify the volumetric airflow rate of the airflow, the speed of the airflow, or any other variable of the airflow from which one can formulate a judgment about the operating efficiency of the air handling equipment.

Abstract: A powered capture hood assembly to measure volumetric airflow in heating and cooling systems and for ventilation fans. The capture hood assembly has a hood for capturing or providing airflow, a formed nozzle structure attached thereto for conditioning the airflow and a blower apparatus with an adjustable fan attached to the opposite end of the nozzle structure. Subsequent the positioning of the hood over a supply duct, for example, a fan speed controller is utilized to adjust the fan in the tubular blower member to provide a zero or null pressure reading between the venturi portion of the nozzle structure and the local ambient room pressure. A pressure gauge is utilized to measure the pressure differential between a pressure reference tap of the formed nozzle structure and the pressure tap of the blower apparatus to determine volumetric airflow.