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 Topic: Humidifiers
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10/12/2011 at 9:44pm
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Quote: Originally posted by jeff juke on 10/12/2011
I guess the Gary fella hasnt lived in Scotland when he says "Air in winter cant be damp" Well is blo/dy damp just now and its freezing..
Did I actually say that, or is this another case of quoting out of context?
Whatever, air also has a dew point, this is the temperature air will start to give up any moisture it contains, perhaps this point is reached more often that far up north?!
If then the air is at 10c and it's dew point is 7C, then until it gets down to it as a whole, or comes into contact with something at 7C or below, it will happily hold onto the moisture.
By the same token, if it's at it's dew point and enters a van, then the temperature inside must be higher, then the air itself will increase in temperature while inside so moving away from it's dew point.
It certainly will not then deposit any moisture while inside but infact pick up any it comes into contact with, as slight as that amount that might be, but, it's a constant process and that achieves the result.
A little known fact, insurance companies allow less time to dry out a flood damaged building in mid winter than they do in high Summer?
How could that otherwise be?
Note, air has to enter a structure of some sort so it can rise in temperature, it won't work with damp cloths hanging on a washing line outside on a damp cold day.
More likely cloths would get wetter, this would be because the damp cold clothes are at or below the dew point of the air so reversing the process and trying to dry the air!!
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27/12/2011 at 10:24pm
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Much the same conversations go on with tents.
Many people think their tent has sprung a leak, when in fact it is just condensation.
I think, once you're using the van in the winter, after the first few days, the interior should be up to a reasonably regular temperature, so condensation should be kept to a minimum.
These structures (tents & caravans) are designed to cope with condensation. They will be fine. OK, so some of it will be absorbed into the wood/soft furnishings, but this will soon work it's way out when the weather warms up.
The only time to use dehumidifiers in caravans is after you've completed some kind of water ingress work. Maybe if you've repaired or replaced a leaking roof light & the timbers were simply wet, not rotten, & you wanted to dry the van out after completion of said work.
It's still going to be hampered by the fixed ventilation of the caravan, but this may well be blocked off in such circumstances.
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