Specification History

SWS Version Created Specification ID Title Specification Objective Supporting Materials Rationale Status
Version 2025 24/09/2023 - 17:13 6.0201.1c Damper

If the fan does not contain an integrated damper, install a damper that:

opens in the direction of the desired flow

closes when the system is off

fan housing connections shall not interfere with damper operation

Prevent unwanted air movement while not restricting desired air flow

Committee has decided adding a mention of ensuring that duct to fan housing connections do not interfere with damper operation would be helpful as it is already implied by the objective of this spec. Red Line
Version 2020 14/08/2020 - 14:27 6.0201.1c Damper

If the fan does not contain an integrated damper, install a damper that:

opens in the direction of the desired flow

closes when the system is off

Prevent unwanted air movement while not restricting desired air flow

Black Line
Version 2020 14/08/2020 - 14:27 6.0201.1c Damper

If the fan does not contain an integrated damper, install a damper that:

opens in the direction of the desired flow

closes when the system is off

Prevent unwanted air movement while not restricting desired air flow

Black Line