Self-acting back draught damper FIDs

FIDs is a self-acting back draught damper without commissioning functionality, designed to prevent the spread of smoke via the intake air system in ventilation systems.

Quick facts

  • Sizes Ø 80 to 160 mm
  • For mounting on manifold distribution box BRSL


The back draught damper should be used in combination with a fan in use solution, smoke venting via exhaust air or the like and to maintain its function requires the intake air fan to be operational during the fire. The fire protection functions work for all design fire scenarios that can be expected to occur with traditionally used fire development rates. Planning and fire protection analysis are to be made by fire experts.


FIDs has a two piece membrane designed for a very low pressure drop and closes very quickly at overpressure in the serviced space.



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