What does VED mean in UNCLASSIFIED

A Vertical Exhaust Duct (VED) is a vertical duct or pipe that carries exhaust gases and fumes from a building or structure to the outside atmosphere. It is typically installed in commercial and industrial buildings, such as factories, warehouses, and laboratories, to remove hazardous or unwanted gases, smoke, and particles from the indoor environment.

The main components of a VED include:

• Ductwork: The ductwork is the primary component and consists of vertical pipes or channels that convey the exhaust gases.
• Exhaust fan: An exhaust fan is used to create airflow and draw the exhaust gases out of the building.
• Dampers: Dampers are valves that control the flow of exhaust gases and prevent backdraft.
• Hoods or canopies: Hoods or canopies are installed at the source of the exhaust gases to capture and direct them into the ductwork.

Key factors to consider include:

• Exhaust volume and flow rate: Determine the volume and flow rate of the exhaust gases to ensure the ductwork and fan are adequately sized.
• Location of exhaust sources: Identify the locations of exhaust sources within the building to determine the optimal placement of the ductwork.
• Building layout and height: The building layout and height influence the length and configuration of the ductwork.
• Local building codes and regulations: Adhere to local building codes and regulations related to exhaust systems, including fire safety and ventilation requirements.

Benefits of a VED include:

• Improved indoor air quality: Removes hazardous gases, smoke, and particles from the indoor environment.
• Safety enhancement: Prevents the buildup of toxic or flammable gases, reducing fire hazards.
• Energy efficiency: Can be designed to minimize energy consumption by utilizing natural ventilation or heat recovery systems.
• Odor control: Eliminates unpleasant odors from industrial processes or other sources.