Airflow required for pressure across large opening?
Airflow required for pressure across large opening?
(OP)
Long time reader, first time poster.
I am trying to figure out what the airflow is required to maintain a specified differential pressure across an opening between two rooms.
They are basically trying to maintain one room slightly positive compared to the other. There is a large opening between the two rooms. Essentially a large door.
The best thing I could find was the equation below. This equates to a shit ton of air required (as expected). I dont know that this equation actually is applicable to the situation since there is supply and return air in both rooms. Does some sort of mass balance need to be done? I've also looked into natural ventilation theory and equations but they generally involve crossflow and wind velocity.
Q = 2610 * A * dP^.5
Q is differential air flow (supply/exhaust, units of cfm)
A is net open area in ft2
dP is pressure difference across boundary, in inches w.c
Has anyone had to calculate this before or have a better equation to use? Any help is greatly appreciated.
Thanks in advance!!
I am trying to figure out what the airflow is required to maintain a specified differential pressure across an opening between two rooms.
They are basically trying to maintain one room slightly positive compared to the other. There is a large opening between the two rooms. Essentially a large door.
The best thing I could find was the equation below. This equates to a shit ton of air required (as expected). I dont know that this equation actually is applicable to the situation since there is supply and return air in both rooms. Does some sort of mass balance need to be done? I've also looked into natural ventilation theory and equations but they generally involve crossflow and wind velocity.
Q = 2610 * A * dP^.5
Q is differential air flow (supply/exhaust, units of cfm)
A is net open area in ft2
dP is pressure difference across boundary, in inches w.c
Has anyone had to calculate this before or have a better equation to use? Any help is greatly appreciated.
Thanks in advance!!





RE: Airflow required for pressure across large opening?
RE: Airflow required for pressure across large opening?
RE: Airflow required for pressure across large opening?
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RE: Airflow required for pressure across large opening?