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Troubleshooting Common Issues with Fume Hood Ventilation Systems

by | Mar 26, 2024 | 0 comments


Fume hoods are critical components of laboratory safety, designed to protect users from hazardous vapors and gases. However, even the best systems can encounter issues that impact their performance. This article outlines common problems with fume hood ventilation systems and provides guidance on how to troubleshoot these issues effectively.

Common Fume Hood Ventilation Issues

  1. Inadequate Face Velocity: If the air is not moving into the fume hood at the appropriate speed, it may not effectively contain hazardous fumes. This can be due to several factors including blower problems, blocked ducts, incorrect sash position or inadequate air supply.
  2. Airflow Turbulence: Turbulence inside the fume hood can disturb the containment of hazardous gases. This might be caused by improper placement of materials inside the hood or external air currents affecting the hood’s operation, or wrong fume hood design.
  3. Alarm Malfunctions: Fume hoods are often equipped with alarms to warn of unsafe conditions. If these alarms are not functioning correctly, it could lead to a lack of awareness of potential safety issues.

Troubleshooting Steps

  1. Check and Adjust Face Velocity: Use a low flow anemometer to measure the air speed at the face of the fume hood. Adjust the blower speed or check for obstructions in the ductwork if the velocity is outside the recommended range.
  2. Reorganize Internal Setup: Ensure that all items inside the fume hood are arranged to allow unobstructed airflow. Avoid rapid movements near the open sash to reduce turbulence.
  3. Check the fume hood damper positions: This ensures that the fume hood maintains proper airflow which is crucial for safety and effective operation.
  4. Inspect and Test Alarms: Regularly test the fume hood alarms to ensure they are sensitive and responsive. Replace faulty components if necessary.

LabGuard’s Expertise in Maintenance and Support

LabGuard offers comprehensive support and maintenance services for fume hood systems. Our expert technicians can help diagnose and resolve any issues you may encounter, ensuring that your fume hoods continue to operate safely and efficiently.

  1. Preventive Maintenance: We provide regular service checks to prevent common issues before they become significant problems.
  2. On-site Troubleshooting: Our team is equipped to visit your laboratory and provide hands-on support to address any operational issues with your fume hoods.


Troubleshooting and maintaining fume hood ventilation systems are essential for ensuring laboratory safety. By addressing common issues promptly and effectively, you can maintain a safe working environment and extend the life of your equipment. LabGuard is committed to providing top-notch maintenance and support to help you manage your fume hood systems effectively.

If you’re experiencing issues with your fume hood ventilation, don’t hesitate to contact LabGuard. Our team is ready to provide expert assistance and ensure your fume hoods are functioning optimally.

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