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Old 07-03-2014, 06:35 AM   #11
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Originally Posted by Brian B-P View Post
It's too bad they claim this is a "dryer" - it is, in fact, a small (70 watt) heater. If a small heat source helps that's fine, and this is suitable because it is intended to be left on continuously and unattended... it just doesn't remove any moisture so it is not a dryer or dehumidifier.
Actually most dehumidifiers and air conditioners create heat as a byproduct of their operation.
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Old 07-03-2014, 06:40 AM   #12
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Originally Posted by padlin View Post
For the northerners among us.

Have had our Starcraft for 8 years, year before last come spring we had it's 1st case of mildew. Used the chemical tubs last year without a recurrence. How well do the chemical units work in sub zero temps? Mine froze solid at some point and seemed to stay that way till spring. Now with the new trailer I'm going to try something else.

Do you leave your trailer closed up tight or a couple windows cracked?
If the trailer is not being used, condensation would not be an issue during cold weather. Keeping a small heater on and closed up is what I do.
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Old 07-03-2014, 08:43 AM   #13
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Originally Posted by amirie View Post
t said something about keeping the temperature just above the "dew point"
The warmer air is, the more moisture it can hold. The dew point is the combination of the air's water content and temperature at which the air cannot hold any more moisture, so any chilling (such as by touching a colder surface) will cause water to condense out as dew.

Slightly warming air without changing the moisture content allows it to hold the moisture, so it doesn't come out as condensation.

Do the cheap heating "dryers" contain a humidity sensor? Seems unlikely, and in some conditions they wouldn't have nearly enough heat output.

Quote:
Originally Posted by cpaharley2008 View Post
Actually most dehumidifiers and air conditioners create heat as a byproduct of their operation.
Yes, but in this case heat is not a byproduct of the appliance's operation - it is the only effect. There isn't a refrigerant circuit, compressor, condenser, and evaporator in there.
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Old 07-03-2014, 08:51 AM   #14
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Originally Posted by cpaharley2008 View Post
If the trailer is not being used, condensation would not be an issue during cold weather. Keeping a small heater on and closed up is what I do.
If you fill a box with warm air containing some moisture, seal it, and reduce the temperature enough, the air will reach the dew point and the surfaces will be covered with condensation. If you maintain the temperature all winter at the same level as it was at the point it was closed up, there won't be any condensation... but that would be ridiculous to do in many areas.

Reality will be somewhere in between the extremes, and could easily involve condensation, but could be okay depending on the weather on the day you close it up, the outside temperature, and how much heat you add.
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