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Thread: dryer vent

  1. #1
    Jeff Eastman's Avatar
    Jeff Eastman Guest

    Default dryer vent

    Last edited by Jeff Eastman; 12-19-2007 at 03:41 PM.
    OREP Home Inspector E&O Insurance 2

  2. #2
    Tim Moreira's Avatar
    Tim Moreira Guest

    Default Re: dryer vent

    Jeff,

    Your over you limit on length here, not to mention the downward sloped part.

    03 IRC:

    M1501.3 Length limitation.
    The maximum length of a clothes dryer exhaust duct shall not exceed 25 feet (7620 mm) from the dryer location to the wall or roof termination. The maximum length of the duct shall be reduced 2.5 feet (762 mm) for each 45-degree (0.79 rad) bend and 5 feet (1524 mm) for each 90-degree (1.6 rad) bend. The maximum length of the exhaust duct does not include the transition duct.

    I count 26 feet with two 90's which would reduce your total length to 16 feet.


  3. #3
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    25,308

    Default Re: dryer vent

    Yep. Built an addition, relocated the dryer, and instead of taking it right up and out through the roof, they doubled back to the original dryer exhaust.

    Real smart, real smart.

    P.S., I like that plastic covered slinky too.

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  4. #4
    Join Date
    Oct 2003
    Location
    Rockwall Texas
    Posts
    4,517

    Default Re: dryer vent

    There is always talk about the height or the length of a run for a dryer vent, but is there a dryer vent minimum height from a surface.

    Had one this morning that was so low that the concrete patio was soaked directly below the vent.

    It was located near a door and I was thinking during the colder months that this moisture could freeze and provide a hazard.

    Any thoughts.

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  5. #5
    Join Date
    Mar 2007
    Location
    Columbus GA
    Posts
    3,741

    Default Re: dryer vent

    From the 2006 IRC
    R303.4.2 Exhaust openings.
    Outside exhaust openings
    shall be located so as not to create a nuisance. Exhaust air
    shall not be directed onto walkways.




    ' correct a wise man and you gain a friend... correct a fool and he'll bloody your nose'.

  6. #6
    Join Date
    Oct 2003
    Location
    Rockwall Texas
    Posts
    4,517

    Default Re: dryer vent

    Thanks Rick C. for that really quick reference.


  7. #7
    Join Date
    Mar 2007
    Location
    Knoxville, TN
    Posts
    2,330

    Default Re: dryer vent

    I inspected a one year old condo yesterday that had an interesting installation.

    It seems the dryer vent just exhausted into the attic at first. The builder then extended it to the outside. It goes up 10' or so then turns and runs another 20 feet or so. That didn't work so well, so they installed a dryer booster fan.

    There's only a couple things wrong with that installation:
    1. They attached the bracket to the roof truss - OK so far.
    2. But failed to attach the fan to the bracket. It was close, only about an inch away.
    3. They wired it to the forced air unit in the attic. They actually wired it to the "other" side of the switch, so if you trun off the switch to service the forced air unit, it will cut ff power to the fan.
    4. The forced air unit is on it's own 15 amp/120V breaker.
    5. One last thing - The fan doesn't work even though it has power going to it.

    Got to love it
    JF


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