Methods:
During an intervention, positive pressure attack (PPA) or positive pressure ventilation (PPV), to forced evacuation of smoke or gases is used in the fight against fires in enclosed or semi-open volumes. The Drago’s main objective is to disperse and break down quickly and efficiently, all types of toxic fumes.
The Drago powerful positive ventilation (39 000 CFM) accelerates the exchange of fresh air into the structure filled with smoke and hot gases.
SUGGESTED USE:
Tactic 1: Dispersion of toxic vapor cloud during a fire and liquefied gas discharge class C — by the use of water spray or water mist.
Tactic 2: Ventilation– bring the concentration of the toxic vapor cloud below the lower explosive limit or reduction of harmful or explosive concentrations of gas, vapor or aerosol in the air.
Tactic 3: Positive pressure ventilation (PPV) — by the use of forced air:
- Ventilation after extinguishing the fire during the excavation
- Ventilation once the fire under control
- Ventilation before the extinguishing operations (without the presence of flame)
Tactic 4: Positive pressure ventilation (PPV) — use forced air to disperse the smoke and maintain visibility of ground crews.
Tactic 5: Used during a Positive Pressure Attack (PPA) that combines mechanical positive pressure ventilation to remove smoke before fire control and prior to advancing into a building for victim rescue. The Drago creates higher pressure inside the building. This forces interior air out of the structure through an exit hole when lower pressure builds. PPA can increase a fire’s ability to spread and advance. It is important all critical factors are taken into consideration as a PPA tactic.
