Louver Free Area vs Face Area
Louvers have free area less than face area. Using face area for airflow causes undersizing.
Stop if
- What's free area ratio for this louver? Size for specific face velocity to avoid noise and water penetration?
Watch out
- Don't size by face area alone. Don't ignore free area ratio. Don't assume all louvers have same free area percentage.
Check
- Required free area for CFM?
- Free area ratio of specified louver?
- Sized for face velocity?
Steps
- Required free area for CFM?
- Free area ratio of specified louver?
- Sized for face velocity?
Say this to your foreman
What's free area ratio for this louver? Size for specific face velocity to avoid noise and water penetration?
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