Which of the following is NOT a primary function of firestop systems?

The identification of enhancing energy efficiency as not being a primary function of firestop systems is accurate because firestop systems are specifically designed to address fire and smoke control within buildings. Their main purpose is to compartmentalize fire and prevent its spread, thereby protecting life and property.

Preventing the spread of fire is a critical function of firestop systems, as they are engineered to seal openings in fire-rated walls, floors, and ceilings to contain the fire to its point of origin. This compartmentalization is essential for maintaining the integrity of fire barriers in a building.

Stopping smoke transmission is another vital role since smoke can be just as dangerous as fire in the context of a fire emergency. Firestop systems include materials that are effective in preventing smoke from traveling through openings, thereby providing safer evacuation routes.

Containing heat is also a significant function of firestop systems, as these systems are designed to withstand high temperatures and prevent the passage of heat, which can compromise the structural integrity of surrounding components and potentially lead to further fire spread.

On the other hand, while enhancing energy efficiency can be a secondary benefit of well-installed firestop systems—such as minimizing air leaks—it is not their primary purpose. The focus remains on fire control and safety rather than energy savings.