What role can ventilation ducts play in fire fighting?

Ventilation ducts play the following important roles in fire fighting:

First, smoke exhaust effect

In the event of a fire, the ventilation duct can be used as a smoke exhaust channel to discharge the smoke and toxic gases generated by the fire from the building. This is essential to the safety of personnel. Timely discharge of smoke can improve the visibility of the evacuation channel, so that people can escape the fire scene more quickly and safely. At the same time, reduce the accumulation of toxic gases in the building and reduce the harm to personnel.

Second, air supply effect

Positive pressure air supply

In some specific areas, such as evacuation stairwells, front rooms, etc., ventilation pipes can be used for positive pressure air supply. By sending fresh air into these areas, a certain air pressure is maintained to prevent the smoke from the fire from invading. This provides a relatively safe passage for evacuation, ensuring that people are not threatened by smoke during the evacuation process.

Supplemental oxygen

At the scene of a fire, burning consumes a lot of oxygen. Ventilation pipes can deliver fresh air near the fire area and provide enough oxygen for fire rescue personnel so that they can better fight fire and rescue work.

Three, ventilation effect

Before a fire occurs, a good ventilation system can maintain the circulation of air in the building and reduce the possibility of fire. The ventilation pipe can discharge flammable substances such as combustible gas and dust in the room in time to reduce fire hazards. Even after the fire, under the premise of ensuring safety, proper ventilation can help reduce the temperature and harmful gas concentration after the fire, creating conditions for subsequent cleaning and repair work.

4. Play a role with fire fighting equipment

Ventilation ducts can work in conjunction with other fire fighting equipment to improve the overall effectiveness of the fire fighting system. For example, in conjunction with the automatic fire alarm system, when the fire alarm signal is triggered, the ventilation system can automatically start the smoke exhaust or air supply function; With the automatic sprinkler system, the water vapor produced by the fire extinguishing can be discharged through ventilation to improve the fire extinguishing effect.