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Taktische Ventilation

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Jan 8S., Wallenhorst /

497102

Datum

22.07.2008 07:20 MSG-Nr: [ 497102 ]

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Hi!

Habe mal ein wenig nach den Ursprüngen gesucht:

Link

Dazu ein paar Sätze von John Mittendorf, LAFD:

3. EXHAUST OPENING

Exhaust openings can be selected to provide horizontal or vertical ventilation of contaminants. Always create the exhaust opening first (if there ever was an “always” in the fire service, this is it!), and then pressurize the structure or area to be ventilated. If you reverse this order, where will the pressurized airflow go until an exhaust opening is created? The size of an exhaust opening can vary and is dependent upon:

The number of blowers used.
The cubic feet per minute (CFM) rating of blowers that are used.
The size of the area to be ventilated.
As an example, let's apply this general guideline to a single-story, single-family dwelling of about 1,800 square feet:

A single 18-inch blower powered by a 2- to 3-horsepower engine would be most efficient when used with exhaust openings that are three-fourths to about the same size as the entrance opening.

A single 18- to 24-inch blower powered by a 5-or-more-horsepower engine would require an exhaust opening between one and one and one-half the size of the entrance opening.

Multiple 18- or 24-inch blowers powered by approximately 5-horsepower engines and in series or stacked configurations would require exhaust openings up to one-and-three-fourths the size of the entrance opening.

Grüße, Jan

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