Projects Tag: PPV

Underwriter Laboratories (UL) Firefighter Safety Research Institute completed a series of experiments to evaluate positive pressure ventilation (PPV) during fire attack and to provide the fire service with scientific knowledge of the effects of PPV tactics. The series of experiments…
Scandinavia has been a leader in using scientific research to better understand fire behavior, and more importantly, incorporating this understanding into training and tactics for firefighters. This paper summarizes much of the great Scandinavian research aimed at benefiting the fire…
Underwriter Laboratories (UL) Firefighter Safety Research Institute teamed with the National Institute of Standards and Technology (NIST) to perform a series of full-scale fire behavior experiments with the Fire Department of New York. The goal of the experiments was to…
An increase in firefighter injuries and deaths in residential structure fires is partly attributed to improper ventilation tactics due to a lack of understanding of fire behavior. These ventilation and suppression tactics have remained substantially unchanged in the United States…
For many decades, firefighters in the United States have been fighting fires without any major changes to tactics. The UL Firefighter Safety Research Institute gathered data from full-scale residential structure fire experiments to examine horizontal ventilation practices and the impact …
A series of experiments was run by NIST in large school building to examine the ability of positive pressure ventilation (PPV) fans to limit smoke spread or to remove smoke from areas where occupants may be located. The experiments demonstrated…
Positive pressure ventilation (PPV) fans, when utilized correctly, can increase the effectiveness of fire fighting operations and the survivability of occupants in high-rise buildings. In a high-rise building, it is possible to increase the pressure of a stairwell to prevent…
To compare natural ventilation with positive pressure ventilation (PPV), a series of experiments were conducted in a fire-fighter training burn building. The data showed that when used correctly, both natural ventilation and PPV resulted in lower temperatures within the structure.…
Positive Pressure Ventilation (PPV) is used both to improve conditions during fire attack or after the extinguishment of a fire. It has proven to be a useful tool if used properly, but if used improperly it can worsen conditions and…
Ventilation encompasses the fire operations that release fire or hot gases to the open and affect the flow of gases in a structure. For ventilation operations to be most effective, the theories of ventilation must be understood. Fire Ventilation combines…
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