Screens block ventilation ops by HOW MUCH?

[fullback36]

Was asked a question the other day and can't find the answer anywhere. Its been driving me crazy that I can't find the answer so I thought I'd thow it out here:

Does anyone know how much that screens in a window will block airflow during ventilation operations? I'm looking for a percentage. For some reason it seems like I've heard 75-80% of the air is blocked by the screen, but I can't verify it anywhere.

Thanks for satisfying my curiosity!

[rhbieber]

I think it is 40%. But I read that many years ago, so take it for what it's worth.

Rob Bieber
Director/Producer: "A Firefighter's Journey"
www.firewerxfilms.com

[edpmedic]

50%. Dont forget about curtains and stuff as well.

[ntxsls1]

50%. Dont forget about curtains and stuff as well.

x2^^ 50%...

[Jonnee]

Hey sally we are over here.............


http://forums.firehouse.com/showthread.php?t=109826