Exhaust Dampers

Efficiently Regulating Exhaust Airflow

Dampers are used within ventilation or exhaust systems to control the flow of air. Multiple types of dampers are used within our exhaust systems including Tamco dampers where possible which help reduce the leakage and maintenance requirements while increasing the reliability of the system where dampers are required.

  • Isolation Dampers
  • Bypass Dampers
  • Tamco Backdraft Dampers
  • Damper Actuators

Isolation dampers are used in ventilation systems to prevent or isolate airflow through specific sections of ductwork which are easily opened and closed by an actuator. This allows for specific sections of the exhaust system to be shut off for maintenance while the system remains operational.

Bypass dampers allow outside, unconditioned air to enter the exhaust fan system through the fan inlet. These dampers are typically located on a rooftop plenum or the exterior duct manifold. Their main function is to regulate the flow of the outside air, also known as bypass air, into the system.

Bypass air helps the exhaust fan maintain a constant high-volume, high-velocity discharge plume, which is essential for effective ventilation performance. At the same time, using bypass air reduces the amount of conditioned indoor air that needs to be exhausted from the building. This lowers the need to replace indoor air with newly conditioned air, improving overall energy efficiency.

7600CW red gasket

Backdraft dampers are used to prevent reverse airflow, otherwise known as a backdraft. Reverse airflow occurs when expelled air or gases flow back into the system. Backdrafts reduce energy efficiency by allowing the re-entry of unwanted gases, increasing the operational demands of a system. Tamco dampers belongs within SPX Technologies Engineered Air Movement Division.

Damper actuators are used to open and close dampers remotely. Our S.A.F.E. Controller will send signals to exhaust damper actuators when adjusting the fan operating speed to modulate the bypass damper position in order to improve overall system efficiency.