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  1. #1

    Confused

    Dear all,
    For commercial buidling, what is ventilation rate for washroom? (Ashrae requirement)

    250 sqft, assume 2 persons there

    Thanks!




    [Edited by wyblueheart on 08-11-2005 at 11:51 AM]

  2. #2
    Join Date
    Apr 2002
    Posts
    11,808
    For a washroom used by the public, ASHRAE would typically require 50 cfm per water closet and urinal.

    The Standard Mechanical Code dictates 2 CFM per square foot of floor space.
    The way we build has a greater impact on our comfort, energy consumption and IAQ than any HVAC system we install.

    http://www.ductstrap.com/

  3. #3

    Thumbs up

    Carnak,I got it. Thanks a lot!!!!

  4. #4
    Join Date
    Apr 2002
    Posts
    11,808
    You're welcome
    The way we build has a greater impact on our comfort, energy consumption and IAQ than any HVAC system we install.

    http://www.ductstrap.com/

  5. #5
    How about Bathrooms?? - 8 ACH??

    I don't have Ashrae handbook

    Thank you.

  6. #6

    Talking

    Bath fans should be sized to provide the larger of 50 cfm or 8 ACH in the bathroom


  7. #7
    Join Date
    May 2004
    Posts
    368
    It depends on what mechanical code your under. IMC requires 75cfm's per fixture, there are also new requirements for shower heads as of the 2003 version. Always best to check with the local mechanical inspector. If its a new project or a re-hab there should be drawings approved by the local jurisdiction that will state what is required on all ventilation.
    Vern P: 2003 MBC,MRC,IFGC,IFC
    An HVAC-Talk Michigan Chapter Mechanical Inspector, Jurisdiction-Ann Arbor

  8. #8

    Smile

    thanks. I will check IMC.

  9. #9
    Join Date
    May 2004
    Posts
    368
    the section # is 403 the table giving the cfm's required per occupancy is 403.3
    Vern P: 2003 MBC,MRC,IFGC,IFC
    An HVAC-Talk Michigan Chapter Mechanical Inspector, Jurisdiction-Ann Arbor

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