Introductions

 

Gear Review:

Supraglottic airways and why they suck

 

Carbon Monoxide:

What is it

Pathophiz

DDx

Treatment

 

Ventilation:

Purpose

Remove contaminants

Control fire spread

Addition of air can accelerate combustion, but also can allow heat to escape

Most small, contained fires are ventilation limited – not fuel limited

Backdraft and flashover: Training Backdraft

Render an environment safer

When is it called for?

Once fire is located, to ventilate the fire space and ease interior attack

Clear out a gas leak or carbon monoxide

Confined space

Basic principles

Pressure differentials

Air moves from high pressure to low

Pressure can be created by

Mechanical compression

Entrainment

Heat/fire

Coordinated

Communicated

Controlled

Practical application

Positive pressure

Fan at the door

Contaminant leaves through other openings

https://photos.smugmug.com/Stations-Units/Firehouse-42-Foxfield/Station-42-Foxfield/i-CHLmxsD/0/1a53bb60/X3/Sams023-X3.jpg

Negative pressure

Fan at door and window

Air intakes however it can

Hydraulic negative pressure

Using a 30% fog stream to entrain air

Helpful to exhaust from a specific space

Push-pull

Fans at multiple ends

Exhaust fan and intake fan

Vertical

Utilizes fire draft to exhaust and move air

Procedure: cut a hole in the roof.  Coordinated,

Horizontal

Open a window or door

Allow exhaust

Can supplement with a fan if fire draft is insufficient

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