How Can Hvac Systems Affect Tactical Ventilation
Question: What are the reasons for tactical ventilation?
Answer: Reducing interior heat levels
Decreasing rate of fire spread
Reducing potential extreme fire behavior
improving interior visibility
improving firefighter efficiency
improving victim survival potential
reducing smoke damage and property damage
Question: What considerations will affect the decision to ventilate?
Answer: Risk to occupants and firefighters
Building construction
Fire behavior indicators
Location and extent of the fire
type of ventilation
location of ventilation
weather conditions
exposures
staffing and available resources
Question: What are the basic means used to accomplish ventilation?
Answer: Natural ventilation (natural wind flow), Mechanical Ventilation (fans and smoke ejectors) and Hydraulic Ventilation.
Question: How do smoke, air flow, heat, and flame impact fire behavior in a structure?
Answer: They act as indicators for fire behavior. Reading the fire and understanding the effects of changes in ventilation is essential to effective tactical ventilation and fire fighter safety.
Question: What differences are there between horizontal and vertical ventilation?
Answer: Horizontal ventilation channels heat horizontally out of a structure while vertical ventilation channels heat vertically within the structure out the top.
Question: How do the advantages and disadvantages of natural, mechanical, and hydraulic ventilation compare to one another?
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Question: What are the main types of horizontal ventilation?
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Question: What are the types of vertical ventilation?
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Question: What other types of ventilation situations might firefighters encounter?
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Question: How can a built-in heating ventilation and air conditioning (HVAC) system affect tactical ventilation?
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