Which systems are critical for managing fire and smoke risks in mechanical ventilation?

The correct answer is indeed the option that refers to smoke and fire dampers. These devices are essential components in mechanical ventilation systems, primarily focused on controlling the movement of smoke and heat during a fire event. When a fire occurs, smoke and hot gases rise and can spread quickly through ductwork, compromising safety and exacerbating fire conditions. Smoke and fire dampers are designed to close automatically in response to heat or smoke detection, effectively restricting or redirecting the flow of smoke and fire, thus protecting other areas of the building and enabling safer evacuation routes.

The functionality of smoke and fire dampers helps to maintain compartmentalization, a critical fire protection strategy, by ensuring that smoke does not travel into non-affected areas, which can make a significant difference in the outcome of a fire. They work seamlessly with the building’s fire alarm system, activating when necessary to provide critical time for occupants to evacuate safely and for fire-fighting operations.

In contrast, air purifiers and ventilation filters primarily focus on maintaining indoor air quality and filtering particulates, but they do not possess the capability to manage fire and smoke risks effectively. Fire screens serve a different purpose, often related to preventing flames from spreading or providing a barrier against fire, but they do not actively