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  1. #1
    Join Date
    Feb 2007
    Location
    Bellingham, WA
    Posts
    115

    When does moisture condense

    I was wondering if there was a website or mathematical forumula to determine when moisture in the air will condense. For example, it the interior temperature is 70F and humidity is 40% then the moisture in the air will condense once the window's temperture falls below "X" F.

  2. #2
    Join Date
    Jan 2004
    Location
    PA
    Posts
    68,782
    There is a chart on this site that has what you want.
    http://www.lamtec.com/dew-point-calculator.htm
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    How many times must one fix something before it is fixed?

  3. #3
    Join Date
    Aug 2003
    Location
    Fort Worth, TX
    Posts
    11,376
    This is also a good site:

    http://www.linric.com/webpsy.htm

    To answer your example of 70 degrees/40% relative humidity, the window surface will begin condensing moisture once its interior surfaces fall below 44 degrees.

  4. #4
    Join Date
    Jan 2007
    Location
    bowie md
    Posts
    116
    Its called DEW POINT

  5. #5
    Join Date
    Jul 2004
    Location
    Massachusetts
    Posts
    6,841
    And it varies infinitely, depending on the exact temperature. That's why we measure the humidity as a RELATIVE number. When it gets to 100%, we change the name to water.
    If YOU want change, YOU have to first change.

    If you are waiting for the 'other guy' to change first, just remember, you're the 'other guy's' other guy. To continue to expect real change when you keep acting the same way as always, is folly. Won't happen. Real change will only happen when a majority of the people change the way they vote!

  6. #6
    Join Date
    Feb 2004
    Posts
    2,597
    Consult a psychometric chart.

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