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Old 10-07-2015, 07:32 AM   #1
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Newbie ?: Fall nights and condensation

Daytime temps 78, night to 60. When we get up in morning, there in a lot of condensation in AS. 1. Is this harmful?
2. How do you prevent? Would running heat pump at night to maintain a constant temp inside minimize?

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Old 10-07-2015, 07:47 AM   #2
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An electric dehumidifier with a drain hose to your kitchen sink
drain.
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Old 10-07-2015, 07:49 AM   #3
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The problem is moisture on the inside with cold walls and windows. Open some windows and/or vents a little to let moist air out and cooler, drier air in. Then run heat if necessary for comfort. Alternatively get a small de-humidifier, if shore power available.

We were in 40 degrees and lower without significant condensation except on windows but we have an older trailer with "mouse fur" which I think provides a little more insulation and doesn't provide a cold surface like the newer metal inside skins.

Al
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Old 10-07-2015, 07:55 AM   #4
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We have experienced this problem. When we turn on the heat pump, it gets worse. What we have been doing is to turn on the gas furnace to heat up the trailer a bit. Then we switch over to heat pump. This seems to do the trick for us.

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Old 10-07-2015, 07:56 AM   #5
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We just keep a couple of chamois cloths on hand and dry all around the windows in the mornings.
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Old 10-07-2015, 08:06 AM   #6
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I have measured high moisture levels in the plywood subfloor below the bedroom pano window from high condensation (cold rainy weather, very humid air inside and outside the Airstream) running down outside and inside the interior walls. This could result in floor rot over time because the vinyl finish floor does not allow the subfloor to dry out easily. There can also be corrosion of metal parts.

Try to ventilate the trailer as much as possible, even running the furnace and wasting some propane to be comfortable while helping dry the air and walls. Circulation of the air with the furnace or a space heater with fan helps a lot. We have vent covers over both Fantastic Fan roof vents so we can keep them open even in rain to help ventilate.
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Old 10-07-2015, 08:30 AM   #7
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I run heat and AC together to dry the air.
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Old 10-07-2015, 08:49 AM   #8
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When camping I crack open the roof vents. I do not like to run the dehumidifier if I am in the trailer, it is loud and puts out a lot of heat.
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Old 10-07-2015, 09:33 AM   #9
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We crack our Fantastic vents ( have 2 on our 23fb) a bit, seems to work, no condensation on the windows.
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Old 10-07-2015, 10:22 AM   #10
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You breathe, you cook, you bathe - all put moisture in the air that collects on cold surfaces and can find its way to your plywood subfloor and in a few years be an even bigger problem.
Open a window or vent, use a dehumidifier, run the AC and heat together (so the AC acts like a dehumidifier).
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Old 10-07-2015, 12:11 PM   #11
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Add gas heat to the list of moisture sources. Running A/C and furnace together is a good idea. I enjoy cool sleeping weather so I open windows wide, put on an extra blanket and snooze away. Any breeze will keep the inside dry unless it is raining. With shore power, I use an electric heater which does not give off moisture as gas heat does.
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Old 10-07-2015, 12:27 PM   #12
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Over time, condensation will destroy the floor. You will also have a mold problem.

I use an LG dehumidifier; model # LD301EL. It's the smallest one they make that's on wheels.

I also use plenty of DampRid.

Tom
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Old 10-07-2015, 12:45 PM   #13
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Dehumidifier? Think small ...
https://www.eva-dry.com/dehumidifier...-dehumidifier/
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Old 10-07-2015, 12:48 PM   #14
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Ok

I will stop cooking and bathing but breathing is where I draw the line

haha

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