1. #1
    Forum Member

    Join Date
    May 2008

    Default Screens block ventilation ops by HOW MUCH?

    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!

  2. #2
    Forum Member
    rhbieber's Avatar
    Join Date
    Jan 2009


    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"

  3. #3
    MembersZone Subscriber

    Join Date
    Jul 2007


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

  4. #4

    Join Date
    Mar 2009


    Quote Originally Posted by edpmedic View Post
    50%. Dont forget about curtains and stuff as well.
    x2^^ 50%...

  5. #5
    Forum Member
    Jonnee's Avatar
    Join Date
    Oct 2005


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


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