Specification History

SWS Version Created Specification ID Title Specification Objective Supporting Materials Rationale Status
Version 2020 08/14/2020 - 14:27 6.0303.1i Backdraft prevention

Ensure system contains a backdraft damper between the ventilator and all exterior terminations/intakes that only allows air flow in the desired direction

Equip outdoor air intakes and exhausts with automatic or gravity dampers that close when the ventilation system is not operating

Prevent unwanted air movement

Black Line
Version 2020 08/14/2020 - 14:27 6.0303.1i Backdraft prevention

Ensure system contains a backdraft damper between the ventilator and all exterior terminations/intakes that only allows air flow in the desired direction

Equip outdoor air intakes and exhausts with automatic or gravity dampers that close when the ventilation system is not operating

Prevent unwanted air movement

Black Line