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Explain duct static pressure speaks to what is air systems duct static pressure in building air systems.
There are three pressures available:
It is the standing pressure. Simply drill a hole and insert a pressure probe at a right angle to the air flow.
It is the pressure caused by air velocity. To measure this one must use a pitot tube. Static pressure is subtracted from the total pressure to measure the velocity pressure. The mechanics of the pitot tube does this subtraction.
Total pressure is the total of the static and velocity pressure. This can be measured by using a pitot tube.
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