Important Notes for Multiple Fume Hoods Sharing One Exhaust Fan

When connecting multiple fume hoods to a single exhaust fan system, proper design and balancing are critical for safe operation.

Design Considerations:

• Each fume hood should have a dedicated supply air diffuser to ensure proper face velocity.
• Install balancing dampers at each branch connection.
• Use variable frequency drives (VFD) to adjust total exhaust volume based on usage.
• Ensure the main ductwork is properly sized for the total air volume.
• Consider sound levels and vibration isolation for the fan installation.