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

Design one or more ventilation fans located upstream of all the exhaust inlets to run continuously, or install a system of one or more backdraft dampers to isolate each dwelling unit from the common duct when the fan is not running

Prevent unwanted air movement

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

Design one or more ventilation fans located upstream of all the exhaust inlets to run continuously, or install a system of one or more backdraft dampers to isolate each dwelling unit from the common duct when the fan is not running

Prevent unwanted air movement

Black Line