Which item is commonly used to move air and create negative pressure in ventilation operations?

Which item is commonly used to move air and create negative pressure in ventilation operations?

• A. Smoke ejector
• B. Fan
• C. Blower
• D. Pump

Answer: (A)

In ventilation operations, the goal is to move air efficiently and pull contaminated air out of a space by creating negative pressure. A smoke ejector is a portable, purpose-built device designed to exhaust large volumes of air with low resistance, which makes it ideal for rapidly pulling smoke, heat, and gases out of a room or compartment. Its design supports quick deployment at doors or windows (or with ducting) to establish the needed negative pressure and improve visibility and tenability for occupants and firefighters. Other devices like a general fan or blower can move air, but they aren’t as optimized for rapid smoke control in confined areas, and a pump is used for liquids, not air.