in HVAC You need these measurements to calculate volume of air flowing through a duct. (Select all that apply)
A. Velocity pressure B. Air Temperature C. Duct shape D. Duct area
To calculate the volume of air flowing through a duct, you need the following measurements:
A. Velocity pressure - This is used to determine the velocity of the air in the duct. D. Duct area - This is necessary to calculate the volume flow rate using the formula: Volume Flow Rate = Velocity × Duct Area.
So, the correct answers are A (Velocity pressure) and D (Duct area).
Air temperature (B) and duct shape (C) are not directly required for calculating the volume of air flow, although they may be relevant for other calculations or considerations in HVAC