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Old 11-17-2018, 05:32 PM   #15
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we open the bathroom vents, seems to stop most of the condensation
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Old 11-17-2018, 11:48 PM   #16
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Originally Posted by Al and Missy View Post
Water (along with carbon dioxide and carbon monoxide) is a combustion product of propane, yes, but the combustion chamber is sealed from the inside. Inside air passes through a heat exchanger. The propane flame and combustion products are on the other side. The furnace simply heats inside air with whatever moisture is in it, but does not add moisture.

Al
yes of course the furnace is sealed ...I wasn't thinking .... you still would get a small amount from cooking.
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Old 11-18-2018, 12:37 AM   #17
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A lot of moisture is given off just by human breathing and perspiration.
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Old 11-21-2018, 12:01 PM   #18
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Air movement is caused by a difference in temperature. Warm air rises, cool air falls. Warm air can hold more moisture than cool air. If you can have a vent open in the roof and another near the floor, ideally at opposite ends of the coach, you can reduce the humidity in the coach. Running a vent fan when cooking, showering, or even washing the dishes will help.


Jo Ann is cooking noodles right now. The vent fan is running and a kitchen window is open. The bathroom vent stays open all the time.
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Old 11-25-2018, 10:28 AM   #19
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Keep the vent open

When we are in our unit ('12 28' International) we keep both the shower and lavatory vent open weather the fans are on or not. It provides a vent and it has greatly reduced the amount of condensation in the trailer when we are in it in the winter.
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Old 11-25-2018, 11:13 AM   #20
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Something like the mr. heater ventless propane heaters will add moisture to the air.


An electric heater is a dry heat.


For winter perhaps running an electric heater instead of a dehumidifier would work.


Condensation, rot, potential mold, and me not having good cheap answers for those is part of why I dream of full timing but don't know if I want to deal with fulltiming.
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Old 11-25-2018, 12:41 PM   #21
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Dehumidifier

I spent last winter in Spokane in my AS and had a LOT of condensation. (Amazing how much water vapor one person and 2 dogs generate.) This winter, I'm again in my AS in an area that is much colder and wetter than Spokane.

I bought a mid-sized dehumidifier a few months ago and now run it 24 hours/day because of all the condensation last year. It does a great job. None of my windows or walls have condensation. It holds 20 pints and I empty it every other day. (I already had a dehumidifier for my home but it was huge and would take up way too much room in the AS.)

The dimensions of my new unit are 11 x 6.7 x 19.1 inches and it just weighs a little more than 22 pounds. I keep it in the BR on the floor next to the small cabinet. It does fit on top of the cabinet, but is out of sight when on the floor.

I can't recommend a dehumidifier strongly enough to reduce/eliminate condensation.
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Old 11-28-2018, 07:25 PM   #22
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Thumbs down Humidity mold

One of the accordian ocean air shade has mold spots on the wrap around window side. How to deal with that?
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Old 11-28-2018, 09:43 PM   #23
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Quote:
Originally Posted by andyherman View Post
I spent last winter in Spokane in my AS and had a LOT of condensation. (Amazing how much water vapor one person and 2 dogs generate.) This winter, I'm again in my AS in an area that is much colder and wetter than Spokane.

I bought a mid-sized dehumidifier a few months ago and now run it 24 hours/day because of all the condensation last year. It does a great job. None of my windows or walls have condensation. It holds 20 pints and I empty it every other day. (I already had a dehumidifier for my home but it was huge and would take up way too much room in the AS.)

The dimensions of my new unit are 11 x 6.7 x 19.1 inches and it just weighs a little more than 22 pounds. I keep it in the BR on the floor next to the small cabinet. It does fit on top of the cabinet, but is out of sight when on the floor.

I can't recommend a dehumidifier strongly enough to reduce/eliminate condensation.
Andy,
What brand/model is that dehumidifier?
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Old 11-29-2018, 12:49 PM   #24
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Dehumidifier

Here's a link to the dehumidifier I bought -

https://www.amazon.com/gp/product/B0...0?ie=UTF8&th=1
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Old 11-29-2018, 04:36 PM   #25
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Hi

There is no magic about this. It is not specific to one trailer or motor home design. If you are living in the trailer in the winter, this *will* be a problem. If there are several of you and maybe a couple pets ... even bigger problem. Toss in cooking with propane or taking a shower ...way bigger problem.

Trailers have a *very* small volume compared to a normal house or even a cabin. However much humidity this or that generates, it's combining with less air. Cut the volume in half and you double the RH. If your trailer is 1/10 the volume of your house, 10% RH in the house is 100% in the trailer.

Next up are the windows and walls. Neither one gets insulated the way they would in a modern house. Thus they get colder. If the RH is high and you have a cold surface ... you get condensation. That's just how it works. The windows and walls will always be cold.

Pop open a window or two to dry things out? Sure that can work. You now need to supply more heat to deal with the 10 degree F air you are letting in. That creates its own set of added issues on top of simply heating the trailer in the first place.

If you run a dehumidifier, be sure you watch the water tank on it. If they are doing a proper job, it's going to fill pretty quick. One with a small tank may not be perfect for everybody.

Bottom line - this is one of the reasons why these trailers are called "three season" items.

Bob
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Old 11-29-2018, 10:15 PM   #26
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Here is a hint, get a dehumidifier that can have a drain hose attached. Place it next to the shower, with the hpse pointed downward into the drain.
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Old 12-13-2018, 02:08 PM   #27
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So an update to this, I dryed the windows as well as possible with a hairdryer and put a few layers of reflextex against that window, then sealed with a plastic heat shrink kit and aluminum tape. This eliminated the moisture issue. I left the other rear pano window with just plastic seal (no reflextex) and it's also not had any condensation form behind the plastic. The issue with these windows was definitely that I sleep on my side, and my breath would blow under the curtain while I slept, but other than that there was no air circulation behind the curtain, so condensation really built up. Plastic keeps my breath off those windows, no condensation, no problem.

I also leave the shower exhaust fan on 24/7, and obviously the oven fan while cooking.

The front windows occasionally get a bit of condensation when cooking or showering, but are designed so it runs down to the channel and out a weep hole to outside.

The woodstove exhausts so much air and outputs so much heat that there are no humidity issues while it's running.


Been in the teens at night for approaching a month now, so far so good
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