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 Do dehumidifyers generat heat???		  New Topic  Topic Locked
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djn
Master Marine Consultant

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USA
1561 Posts
Initially Posted - 11/30/2006 :  12:11:25  Show Profile
I'm sure I spelled this wrong, but I was looking at small dehumidihyers and a number of them had a drying rack on top. Do they give off heat as part of their function? If so, is it enough to heat the boat over the winter? I have some constant dampness on the boat and thought that running the dehumidifyer over the winter I could get rid of it. Cheers.
Dennis
No Boat
S.E. Michigan
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Renzo
Admiral

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USA
621 Posts
Response Posted - 11/30/2006 :  13:15:47  Show Profile
Dennis,
Dehumidifiers work on the same principle as refrigerators and air conditioners. They have a cooling system that refrigerates the air entering the unit. The moisture in the air condenses on the cold coils and drips into a holding tank. The cold air is then passed over a warm set of coils and reheated to just a little over room temperature. They use quite a bit of electricty (about the same as a small air conditioner so it could be costly to run one on the boat all winter. also it will probably ice up alot because the interior of the boat will be cold unless you also are running a heater to keep it well above freezing(more $$$$). I would opt for using a small ceramic heater or a large light bulb and installing some dellequescent chemical dehumidifiers placed in the low part of the boat.
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Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts
Response Posted - 11/30/2006 :  13:34:33  Show Profile  Visit Frank Hopper's Homepage
There is the technical definition, the conventional definition and the specific definition. Specifically, a West Marine dehumidifier is a low wattage electric heater with a fan.
like this one
they work well. They probably should call these anti-condensation heaters.
Edited by - Frank Hopper on 11/30/2006 14:18:24
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djn
Master Marine Consultant

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USA
1561 Posts
Response Posted - 11/30/2006 :  15:04:08  Show Profile
Thanks Larry and Frank. If this was just a normal winter storage, I would approach it differently. But my boat seems to have water somewhere were I can't find it or something. The boat really needs to be dried out throughourly and that is why I am thinking about something that will pull any moisture out of the air. I know it will cost some $$$ but it is worth it. Cheers.
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Renzo
Admiral

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USA
621 Posts
Response Posted - 11/30/2006 :  15:05:57  Show Profile
Right you are Frank! The device advertized by West as a dehumidifier is actually a heater with a fan to circulate warm air to keep the boat above the dew point temperature where condensation would form. It does not remove moisture from the air and any nooks and crannies of the boat where the air does not circulate (especially near the outer hull, (I'm thinking of areas like the bilge or he stern area behind the access hatch) are still subject to condensation.
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.