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Old 11-26-2013, 07:15 AM   #15
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Originally Posted by mel stuplich View Post
X2 on a small dehumidifier.
(For convenience place it to drain into the shower drain and run it 24/7).

IMO, cold weather condensation in a RV is normal, and not necessarily a manufacturing defect, (any more than condensation on a cold can of beer is an indication of a bad can).

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X3. We use a small (25 pint) dehumidifier. Works great and also produces warm exhaust air which helps heat the rig.

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Old 11-26-2013, 08:09 AM   #16
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You should also minimize any sources of evaporating water. One of the biggest culprits are the wet shower walls. Get a squeegee and get all the droplets off the shower walls and door and squeegee it all into the drain. Take damp clothing, dishrags etc outside. Dry dishes and hang wet dish rags etc outside, or put into a storage compartment (assuming the storage compartment is sealed off from the coach) and leave that bay cracked open. Hope that helps in addition to all the other suggestions.

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Old 11-27-2013, 09:50 PM   #17
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I think the reason you are having problems around the slides is there is alot of extra steel/ alum framing in the walls around the openings for the slides. This reinforcing means there's no insulation in those areas. We have noticed we get alot heat in the summertime around our slides here in AZ. I took a heat gun and measured the wall temps. The highest temperatures were around the slide openings at the wall reenforcements. No insulation in those areas, all the room in the walls is taken up by the reenforcements. So with a lot of condensation its going to condensate and freeze at the cold spots where you have the least amount of insulation.
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Old 11-27-2013, 11:18 PM   #18
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Originally Posted by lllkrob View Post
Electric heat is dryer than propane and will lower the humidity level quite a bit.
This is an old myth that does have some truth IF you are using an open flame heat source like an old Deerborn heater.

With a modern furnace, the combustion process is within the forced draft heat exchanger. The air blows across the other side of the heat exchanger and the result is no different than an electric resistance heater.

To reduce the moisture, you need to eliminate heat sources as much as possible. vent when cooking or showering, Leave a vent cracked open all day and night. Just your breathing and skin evaporation puts a lot of moisture in the air. Also use a squeegee to wipe the water from the shower walls and floors.

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Old 11-28-2013, 11:17 AM   #19
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Keeping a vent open all the time has really reduced the problem. Thanks to all for your suggestions.

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Old 09-25-2014, 06:29 PM   #20
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I used Rain-X Anti Fog and helped a little more with the roof vent opened a inch but I still get enough to make it a hassle cleaning inside the front glass before we can drive. Naturally the hardest access window is the one the gets it the most.

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