What Does Fast Moving Smoke Indicate?

Which type of building is the most prone to the stack effect?

Elevator shaft, stairwells, utility conduits, and other unpartitioned spaces are particularly vulnerable to stack effects.

Failing to plan for the stack effect can cause some real problems.

For example, The taller the building, the greater the pressure difference between air at upper floors and at the ground floor..

Which is a disadvantage of positive pressure fans?

What is one disadvantage of positive-pressure fans? They can spread the fire if used improperly. … For heat and products of combustion to exhaust during positive-pressure ventilation, there must be an opening: near the seat of the fire.

Which effect is caused by temperature difference inside and outside a building?

Bad Air Out, Good Air In. Every day more and more commercial and industrial buildings are seeing the benefits of buoyancy ventilation. This type of natural ventilation, also known as stack-effect ventilation, relies on the differences in temperature between the inside and outside of the building to promote air-flow.

What is the greatest danger to fire fighters performing vertical ventilation?

Improved conditions within the structure. What is the greatest danger to fire fighters performing vertical ventilation? Roof collapse?

How do heated gases move in a room?

How do heated gases move in a room? They rise to the ceiling and spread outward. … What is the term for the open space between the ceiling of the top floor and the underside of the roof of a building?

What is the term for the movement of heat that allows natural ventilation?

Only $2.99/month. Convection. What is the term for the movement of heat that allows natural ventilation. natural ventilation. When fire fighters need quick or immediate ventilation, they often use.