Which stairwell is prioritized for pressurization by the ventilation group?

The prioritization of the fire attack stairwell for pressurization by the ventilation group is based on the critical need to maintain a smoke-free environment for responders attempting to combat the fire. Pressurizing the fire attack stairwell helps to ensure that the air remains clear of smoke, allowing firefighters to ascend and descend safely and effectively. This is essential for their safety and operational efficiency, as it allows them to reach the fire while minimizing their exposure to hazardous conditions.

In firefighting operations, ensuring that the route taken by responders to the fire is clear and usable is paramount. The fire attack stairwell is the primary access point for firefighters entering a building to combat a blaze, making it crucial that this area remains pressurized to facilitate their work and keep them protected from smoke and heat.