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Thread: Need help on a condensation question…..

  1. #1
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    Default Need help on a condensation question…..

    I just bought a north river cuddy cabin this year. The boat is great but when we sleep in the cuddy cabin at night it sweats, from our breath. It will get bad enough that water will drip on your face, and if you touch the side you sleeping bag will get wet.
    Has anyone tried Hull liner? I was thinking to add a solar powered fan or two, and putting Hull liner on all the metal to make it quilter and better insulated.
    Any suggestions from someone with experience?

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    Do you have a heater? It is amazing what an Espar will do for you. Ours runs all night and there is very little condensation.
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    pete, does your espar exchange outside air? I know the new wallas 30dt does. Been thinking about upgrading myself and weighing my options. I like the outside exchange.

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    Mine actually pulls air from the cabin, but I can reroute it so it will pull from the outside. I just crack a window.
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    I use the Epsar too and have mine routed like Spoiled Ones. It works great ALL year round. The only condensation I'll get in on my windows but only if I have them covered with my curtains to block out the light. Cracking a window pretty much gets rid of that too.
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    I have a heater but it runs off the motor only works while im running the boat.

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    You need ventilation with or without a heater. No heater, leave the windows wide open and wear long johns or throw another blanket on top. Espar, crack the windows and little to no condensation. You could leave your motor running all night, or get up and heat things up every few hours. My heater pulls from inside air, there are enough air leaks through doors/windows to allow enough air exchange. If you pull outside air you have to heat the mositure up.

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    Quote Originally Posted by aktnt View Post
    I have a heater but it runs off the motor only works while im running the boat.
    Why, You don't have a house battery?

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    Quote Originally Posted by MacGyver View Post
    Why, You don't have a house battery?
    I bet he has an inboard with an outdrive with engine heat.
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    Member Dan in Alaska's Avatar
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    Quote Originally Posted by MacGyver View Post
    Why, You don't have a house battery?
    I'm guessing it's an inboard.

  11. #11

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    For the Wallas cooktop/heater that I have, it doesn't pull air from the outside. The only air that is exchanged is the air that it pulls into itself (into the combustion chamber, from the air inside the boat) and then exhausts outside. There's a fan in the lid that blows over the top of the hot cooktop surface and that's what distributes the heat. No need to crack a window. As long as the temp inside the boat increases, the relative humidity decreases. Never a problem with condensation, but it's also a fiberglass boat which tend to be more insulated. A buddy has the same Wallas setup as mine, but on his 26-ft. North River there will be some condensation in the V-berth unless he keeps on a fan in there that draws out moisture and helps draw the Wallas heat up into that area. There's some kind of coating that I've heard about that helps with this problem. Think I read it over in the Cbrats boating forum (C-Dory owners).

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    I asked the same question a year ago,

    http://forums.outdoorsdirectory.com/...tion?highlight=

    and provided there isn't a heavy driving rain, even cracking a window just enough to see daylight makes a huge difference with 2 people sleeping on the boat. With three people, I found if I also crack the opposite window or crack the door (holding it from swinging open with a bungee cord) eliminates the heavy condensation. Heat resolves a lot too, but I don't always run it and you said you couldn't run yours without the motor running.

    There are other suggestions in the thread I linked above for you to read.

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    Yea i have the Diesel inboard motor with a out drive. We tried to open the windows and helped some. The boat is only a 25Ft and the roof is low in the cabin and collects the moisture in the breath easly. I was thinkinking that i would insulate the roof in the cuddy and then add carpet or hull liner.

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    I had a plexiglass vent on the outside of my sliding window that i could leave open in just about any weather. I cut the plexi to fit then just mounted it with a few screws and used hard foam for a spacer/gasket to hold it off the window.
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    Insulating will help for sure. My cuddy is insulated and the roof and walls of the main cabin are as well. This makes a huge difference IMO. An aluminum boat is a heat sink, too. So our cold waters keep the boat cool. This contributes to the condensation problem that you are experiencing. If you can scrounge up a couple of grand, I highly recommend looking into a forced air heater like the Espar, Webasto, or even a Wallas.
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    Since my boat is a fiberglass Bayliner, my opinion probably doen't count when it comes to aluminum hulls. However, we have a Nicro solar-powered vent fan that does a great job keeping moisture/condensation under control. It's fitted in the plexiglass hatch above the V-berth, and works well to exhaust the sleeping area. Of course, the boat is fiberglass, and the interior is lined, so I'm sure that makes a big difference. I'd think it would definitely help with positive exhaust of even an aluminum boat to cut down on condensation.

    nicro_day_night_solar_vent.jpg100_3030.jpg

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    Sponsor potbuilder's Avatar
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    Maybe one these propane heaters would help, i know a lot of the bowpickers have them me i'm installing a Alaska model heater by Dickinson, looks the same just runs on diesel.

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