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  1. #11
    Seasoned Camper more tired since retired's Avatar
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    Was your space heater propane? Assuming you were using a propane space heater, that is the source of a lot of moisture. Burning propane releases more moisture than burning natural gas. You will also add moisture to the interior atmosphere when using the stove burners and/or oven. Again, burning propane inside of the unit will add moisture to the atmosphere. Now if you were using your furnace, the above does not effect you since the exhaust (which contains the moisture) is to the outside.

    Using an electric space heater, while it doesn't release moisture, the moisture in the warm air condensing on the windows is caused exactly as described above. Same with the furnace.

    One other thing to try is to leave the bathroom overhead vent cracked open. Heat (with moisture) rises and will exit. You will burn some additional propane but the amount of moisture should be somewhat reduced.

    One question for everyone, is it possible to change out single pane windows for factory double pane? I would guess it can be done though it would probably be expensive.
    2020 F-250 XLT SuperCrew 7.3L Blue Ox SwayPro, 2020 Imagine 2600RB,
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  2. #12
    Site Sponsor Skiddy's Avatar
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    Single pane windows will fog-up with condensation, virtually impossible to eliminate when outside temps drop and humidity remains high. In a closed trailer a couple could exhale as much as 160ml, about 2/3 of a cup of water overnight. Doesn’t sound like much, but it is usually just enough to make the humid warmer air inside the trailer condense when it contacts the virtually outside temp window and reaches the dew point.
    The windows are designed to handle the moisture, there is a drip collection channel and the windows can be wiped dry during the day if you are so inclined. Unfortunately the walls are a different issue. In our unit, there is a couple of places on the side walls near the head of the bed wardrobes that I’m sure is not insulated at all. The wall feels cold and has the same condensation on it as the windows. Air movement helps as does the inside plastic heat shrink temporary storm window noted above.
    Judy & Larry
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    2019 Imagine 2150RB - lovingly christened “IM-A-GENE” towed by Dusty via Andersen 3350.
    2018 F150 SCREW 3.5 EcoBoost Lariat - respectfully christened “Dusty”.

  3. #13
    Rolling Along
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    We put foil faced bubble wrap on most of our windows and it seems to cut down on the condensation in the cold. Cold air can still be felt following the bubble wrap down the glass. I broke a window last summer with my weed trimmer throwing a rock, one of the large bay windows on the dining slide out of our 310gk. I asked about upgrading the window when I replaced it with a dual pane and it was over 500.00 extra. The dual pane option is only 1500.00! I decided to try a ceramic window film, I should know over christmas if it helps or not. It did cut some of the radiant heat in the summer, but not as much as I had hoped.
    2023 GMC 3500HD CCLB DRW Duramax L5P, Banks Derringer/Idash/CAI 60 gallon fuel transfer tank
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  4. #14
    Seasoned Camper more tired since retired's Avatar
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    Anyone know what would be involved to change out single pane to double pane windows?
    2020 F-250 XLT SuperCrew 7.3L Blue Ox SwayPro, 2020 Imagine 2600RB,
    1600W Solar w/525AH LiFePO4, Victron 3000W, Road Armor w/wet bolt suspension, VisionWork Camera System, Peplink MAX BR1 Pro 5G Mobile Router,MicroAir EasyStart
    Amateur Radio Call N9XGZ FMCA#489460 Escapees SKP#166379

  5. #15
    Site Team Second Chance's Avatar
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    Quote Originally Posted by more tired since retired View Post
    Anyone know what would be involved to change out single pane to double pane windows?
    Thousands of dollars - and perhaps a trip to the factory. We considered it on the Reflection and decided there wasn't a cost/benefit.

    Rob
    U.S. Army Retired
    2012 F350 DRW CC LB Lariat PS 6.7
    2020 Solitude 310GK-R, MORryde IS, disc brakes,
    Sailun LRG tires, solar, DP windows, W/D
    (Previously in a Reflection 337RLS)
    Full time since 08/2015

  6. #16
    Big Traveler JCZhome's Avatar
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    Quote Originally Posted by more tired since retired View Post
    Anyone know what would be involved to change out single pane to double pane windows?
    I had a Momentum 376TH and got an estimate to convert them to dual pane.....just over $10,000. That was at Mike Thompson's RV and they have very bad reviews for customer service. If you had ordered it with dual pane I believe it's only a couple thousand more and well worth it!

    $10k is way more than I was willing to pay however, in the summer months in So Cal I had the ceramic film put in my truck (even the front windshield, since it wasn't tinted) and it reduces the heat dramatically. So I then had the Momentum done.....I think it was $1,200-$1,400. It had a bonus feature.....with all the windows lined on the interior we never had any more condensation in the winter months......not even when we were in the snow at 18F.

    You should know that the furnace will cause condensation (if you don't have the ceramic film on the windows) however, if it's below 32F you have to run your furnace to keep your plumbing from freezing. In the winter months we would use the furnace and the fire place and at times an additional electric space heater.
    SOLD my 2017 Momentum 376TH being pulled by a 2014 Ford F-350 Lariat, FX-4, Crew Cab, Longbed, Dually. Not pulling the 5er, catch me on my 2013 CVO Harley Ultra Classic.

    Map = states that we've stayed at least one night in our RV.

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  7. #17
    Site Team Second Chance's Avatar
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    Quote Originally Posted by JCZhome View Post
    ...You should know that the furnace will cause condensation...
    The only way the furnace would contribute to condensation would be to increase the temperature differential between the interior and exterior of the trailer (presenting colder glass to the warmer air inside). All byproducts of combustion (carbon dioxide and water vapor) are exhausted externally, so the furnace does not contribute to interior humidity unless there is a leak in the heat exchanger - in which case you have worse problems than moisture.

    Rob
    U.S. Army Retired
    2012 F350 DRW CC LB Lariat PS 6.7
    2020 Solitude 310GK-R, MORryde IS, disc brakes,
    Sailun LRG tires, solar, DP windows, W/D
    (Previously in a Reflection 337RLS)
    Full time since 08/2015

  8. #18
    Site Sponsor orbiker's Avatar
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    Quote Originally Posted by Jfalk13 View Post
    Hey guys took our Imagine Out for the first time and woke up this morning to condensation on all interior windows. We ran a space heater inside but didn’t have the main heater on all
    Night. What can we do to prevent this? We will be camping for 1-2 weeks every winter so don’t want some major repair. Thanks in advance
    Quote Originally Posted by more tired since retired View Post
    Was your space heater propane? Assuming you were using a propane space heater, that is the source of a lot of moisture. Burning propane releases more moisture than burning natural gas. You will also add moisture to the interior atmosphere when using the stove burners and/or oven. Again, burning propane inside of the unit will add moisture to the atmosphere. Now if you were using your furnace, the above does not effect you since the exhaust (which contains the moisture) is to the outside.

    Using an electric space heater, while it doesn't release moisture, the moisture in the warm air condensing on the windows is caused exactly as described above. Same with the furnace.

    One other thing to try is to leave the bathroom overhead vent cracked open. Heat (with moisture) rises and will exit. You will burn some additional propane but the amount of moisture should be somewhat reduced.

    One question for everyone, is it possible to change out single pane windows for factory double pane? I would guess it can be done though it would probably be expensive.
    Like More Tired said; One other thing to try is to leave the bathroom overhead vent cracked open. Heat (with moisture) rises and will exit. You will burn some additional propane but the amount of moisture should be somewhat reduced.


    The best thing to do is to manage moisture. Let it get out.
    We leave the bathroom vent open almost all the time. Sometimes just barely; sometimes wide open. We use a small squeegee to wipe down the whole shower. If you wipe down with a towel; the moisture is still in the RV, instead of going down the shower drain.

    We are camped at the Oregon Coast now. It rained about an inch and was only 45*. We cooked spaghetti last night. The hood fan is not vented to the outside yet. There was a little condensation, but slowly went out the bathroom vent with some of the heat. It was only cracked open about an inch.

    I think all rv's should come with vent covers. KEN
    Backpacker and tent camper all my life, including BSA as a kid and adult.
    Motorcycle trips across the USA with a tent - 1978 to Present.
    02-10-2005 - 2002 F350 SWD PSD and 2003 Citation 10'8S mostly for Crater Lake Ski Patrol.
    10-29-2015 - 2016 Grand Design 380TH. It's HUGE compared to a camper.
    10-19-2018 - traded truck for a 2016 Ram 3500 DRW Laramie CC 4 X 4 Long Box.
    03-16-2019 - Traded Momentum for a New 2018 374TH-R Solitude
    FULL TIME RV'er Nov 2021

  9. #19
    Site Sponsor orbiker's Avatar
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    Picture a jar with a little water in it. Screw the lid on. Put it in the sun. The jar will condensate, but the water can not get out.

    Poke 2 or 4 holes in the lid. The water leaves when the jar warms up. KEN
    Backpacker and tent camper all my life, including BSA as a kid and adult.
    Motorcycle trips across the USA with a tent - 1978 to Present.
    02-10-2005 - 2002 F350 SWD PSD and 2003 Citation 10'8S mostly for Crater Lake Ski Patrol.
    10-29-2015 - 2016 Grand Design 380TH. It's HUGE compared to a camper.
    10-19-2018 - traded truck for a 2016 Ram 3500 DRW Laramie CC 4 X 4 Long Box.
    03-16-2019 - Traded Momentum for a New 2018 374TH-R Solitude
    FULL TIME RV'er Nov 2021

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