How do you determine pre and fine filter effective area size to maintain maximum 500 FPM face velocity across coil?
This involves a series of steps :
1. Calculate the face
velocity: The face velocity is the speed at which air is flowing through the
filters and across the coil. In this case, the desired face velocity is 500 FPM
(feet per minute).
2. Determine the airflow
rate: The airflow rate is the volume of air that needs to be filtered. This can
be calculated based on the HVAC system specifications and the design
requirements.
3. Calculate the
filter area: The filter area is the effective area of the filters that will
maintain the desired face velocity. The filter area can be calculated using the
equation:
Filter Area = Airflow Rate / Face Velocity
1. Determine the size
of the pre and fine filters: Based on the filter area calculation, the size of
the pre and fine filters can be determined. This will ensure that the maximum
face velocity of 500 FPM is maintained across the coil.
It is important to note that the filter area and size may also be influenced by factors such as filter type, filter efficiency, and system pressure drop. It is recommended to consult with an HVAC engineer to determine the specific requirements for your HVAC system.
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