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  1. #14
    Join Date
    Apr 2007
    Location
    Pa
    Posts
    758
    chilled beams are supposed to have drain pans according the mechanical code book?

  2. #15
    Join Date
    Aug 2006
    Posts
    2,609
    Quote Originally Posted by bbaumer View Post
    Anyone ever use the version with a drain pan?

    Called valence cooling:

    http://www.sigmaproducts.com/catalog...0%20d%20sm.pdf

    They use that system in super secure prisons.

  3. #16
    Join Date
    Mar 2003
    Posts
    7,326
    i cant imagine humidity in dc is much different from philly. up here, the engineers are a tad conservative with these systems, so what you see is typically an energy recovery makeup air unit somewhere in the building. this unit utilizes a total energy wheel, cooling coils with traditional chilled water temp supplied, and a reheat coil. two things are typical, first you see more air movement that usual for a given size buiding, and second control of airside is critical to get dewpoint low enough so condensation isnt an issue. water for the chilled beams is typically kept in the sixty degree range to perform mostly sensible cooling. the dehumidification is done in the makeup air unit. on jobs we see, it is usually one time through, and out no return air utillized. they claim tremendous energy efficiency versus traditional systems.

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