INVOLVED-Tactical ventilation Flashcards
Definition of tac vent?
Definition of ventilation?
The systematic, & coordinated removal of hot smoke and fire gases their replacement with fresh air as part of the IC’s overall plan.
The removal of products of combustion from a structure and their replacement with a supply of fresher air in order to improve conditions.
Definition of defensive ventilation?
Carried out away from the fire, or after it’s been extinguished, to remove heat and smoke, particularly to improve access and escape routes in areas of the building not directly affected by the fire.
Definition of Offensive ventilation?
Carried out close to the fire compartment to have a direct effect on the fire itself, to limit fire speed and to make conditions safer for firefighters.
Definition of Natural ventilation?
Describes collectively the techniques of ventilation which are not assisted by mechanical means. This includes the use of installed vents, windows and doors.
Self/uncontrolled ventilation?
Ventilation of a compartment caused by the failure of windows , doors or other elements of structure resulting from the action of the fire.
Consequential ventilation?
Ventilation of the fire as a result of firefighting ops. When FFs begin firefighting and rescue ops at a building they cause ventilation as a result of these activities. This could cause rapid fire development.
Sequential ventilation?
(Positive pressure ventilation) - When multiple floors or rooms are required to be ventilated. The process of sequentially isolating and opening doors and windows so that the area can be cleared of products of combustion
What is negative pressure ventilation?
Describes the process where ventilation of a compartment is achieved by reducing the pressure within it using fans or a branch set to a cone pattern and directed out of an opening to induce a Venturi effect.
Describe positive pressure ventilation (PPV).
Fans are used to ventilate a compartment or structure by forcing air into a building. This has the effect of increasing the pressure inside the structure, which drives heat and products of combustion through an outlet to open air.
PPV is currently under evaluation. Two sets of PPV fans are carried on special all wheel drive vehicles. These vehicles are crewed by operatives who have received specific training. PPV should only be used by appropriately trained personnel.
What is the following:
Describes the identification And use of available routes within a building where fresh air can enter a compartment and the products of combustion can travel to a planned outlet to open air.
Ventilation pathway
