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  1. #1
    Join Date
    Oct 2009
    Location
    Mukwonago, WI
    Posts
    235

    Smoke Extraction System

    Got an email today for a request to price out a smoke extraction system. (2) 40,000 CFM fans for this atrium.

    This is the window they want to use for the gravity makeup air. 2'x8' louver at 80,000 CFM is a 46.5" WC pressure drop, or 1.7PSI!!!
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  2. #2
    Join Date
    May 2011
    Location
    Western, KY
    Posts
    2,903
    Quote Originally Posted by Miller257 View Post
    Got an email today for a request to price out a smoke extraction system. (2) 40,000 CFM fans for this atrium.

    This is the window they want to use for the gravity makeup air. 2'x8' louver at 80,000 CFM is a 46.5" WC pressure drop, or 1.7PSI!!!
    Did you tell him that you'll do it IF he sucks a golf ball through a garden hose?

  3. #3
    Join Date
    May 2000
    Location
    Monmouth Junction-NJ-USA
    Posts
    5,996
    They could perform wind tunnel tests.
    If you really know how it works, you have an execellent chance of fixin' er up!

    Tomorrow is promised to no one...

  4. #4
    Join Date
    Jan 2009
    Location
    Keokuk, IA
    Posts
    5,520
    Tell them they have 3 options:

    1) Supply a larger air inlet
    2) Reduce CFM requirements
    3) Install vacuum pumps instead of blowers.
    4) To hit the 5000fpm required, a large 200HP blower will be mounted in the window with a similar size blower on the roof.

  5. #5
    Join Date
    Jan 2009
    Location
    Keokuk, IA
    Posts
    5,520
    Quote Originally Posted by rayr View Post
    They could perform wind tunnel tests.

    nah... only 56mph if I did my math right.

  6. #6
    Join Date
    Oct 2011
    Location
    Chicagoland Area
    Posts
    4,510
    Quote Originally Posted by mason View Post
    Did you tell him that you'll do it IF he sucks a golf ball through a garden hose?
    If he could do that I might be inclined....
    Officially, Down for the count

    YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

    I know enough to know, I don't know enough
    Liberalism-Ideas so good they mandate them

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