Investigators Academy
How does ventilation affect fire?
We've seen that oxygen impacts a fire.
Opening a window allows for oxygen.
This is called ventilation.
Keep exploring to learn more
about how fire develops and behaves.
Start over
How does ventilation
affect fire?
What do you need to know to answer this question?
Think about your past experience.
Does fire burn better or worse with fresh air?
Why do some people blow on a fire to get it started?
Click “get started” to explore.
Get Started
Notice the window is closed.
How do you think the fire would behave if the window was open?Would it go out, or would it grow bigger?
Click the window to find out.
Notice the hot smoke is flowing out of the top of the open window.
Notice the cooler air is flowing in the bottom of the open window.
This is called a convection current.
How do you think this will affect the fire?
Click the next hot spot to find out.
Notice the fire grows when the window is open.
Opening the window allows oxygen to enter the room.
Oxygen mixes with hot fuel gases and the fire grows.
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