Bastoune wrote, On 12/2/2013 6:35 PM:
Now, my limited understanding going over the years of wisdom
contained in the RAS archives (!) is that internal condensation
occurs in the evening when the shell of the trailer cools faster than
the air inside the trailer. In this case, continuing to run the fan
in the early part of the night allows the internal and external
temperature to equalize and thus prevent internal condensation. Now,
I am not really sure how leaving a fan on all the time works for the
better in the morning: The glider has been cold soaked all night and
the morning warmer external air is now pulled in the trailer by the
fan. Will that warm morning air condensate against the cool glider?

So… fan on or off at night? Fan on until midnight and then off until
10am? A simple timer could help implement a creative schedule for the
fan operation if there is a benefit to it.

http://www.ebay.com/itm/LCD-Digital-...em4ac4aa 9de3

The important attribute of air for condensation is the dewpoint
temperature. That doesn't vary much from night to day where I live, so
sucking in the night air won't change that.

Because the trailer top will cool more than the air at night, bringing
in the cool outside air (but still warmer than the trailer top) might
slow the drop in inside temperature, and reduce the amount of condensation.

In the morning, the trailer top might get warmer quicker than the
outside air, but because the warm air rises, it won't help warm the
glider very quickly. So, sucking in cooler air may not increase the
condensation.

Does someone need a college thesis?

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to
email me)