Airflow Video:
Description: At the entrance and half-way up the stairwell leading to the fourth floor.

View Now >

Airflow Pictures:

Below: You can see the substantial amount of air flow at the threshold of the stairwell vestibule leading to the fourth floor.

Below: This picture identifies 15 feet from the stairwell illustrating a substantially less amount of air movement.

Below: This photo was taken at the top of the third floor, five feet before the stairwell leading to the fourth floor.