Natural Ventilation is air movement within a workplace caused by wind, temperature difference or other factors where no fan or mechanical air mover is used.

Natural Ventilation is air movement within a workplace caused by wind, temperature difference or other factors where no fan or mechanical air mover is used.

• A. Inlet
• B. Natural Ventilation
• C. Duct
• D. Fan

Answer: (B)

Natural ventilation describes air movement in a space that is driven by environmental forces—like wind pressure on the building and buoyancy from indoor–outdoor temperature differences—without using any fans or other mechanical air movers. It relies on openings such as windows or vents to let air flow through organically. This is distinct from an inlet, which is just an opening; a duct, which is a channel for air in a system; and a fan, which is a device that actively moves air. So the term that best matches the description is natural ventilation.

Natural ventilation describes air movement in a space that is driven by environmental forces—like wind pressure on the building and buoyancy from indoor–outdoor temperature differences—without using any fans or other mechanical air movers. It relies on openings such as windows or vents to let air flow through organically. This is distinct from an inlet, which is just an opening; a duct, which is a channel for air in a system; and a fan, which is a device that actively moves air. So the term that best matches the description is natural ventilation.