Extreme Cold - Page 9 - SailNet Community
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post #81 of 110 Old 02-03-2014
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Re: Extreme Cold

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When I was living aboard (Toronto winters). Some people would hang a 60 watt bulb and fixture next to each through hull to keep then nice and warm over the winter! I did this for a couple of winters and then realized that this technique wasn't necessary with the bubblers in our marina! The system they used had massive compressors and the entire slip would stay ice free.
Even if the slip stays Ice Free due to any kind of bubbling system, (air, agitation, ect) the thru hulls will still freeze if the temp in the bilge gets below freezing.

The light bulb idea is OK, as long as the bulb doesn't burn out, but it's not foolproof.

The most effective way I've found is to pour vegetable oil into these (drains, or inlets, or whatever), and close off the valve while you're doing this. The oil will displace any water in the thru hull fitting, and since oil is lighter than water, it won't seep out the bottom, below the valve. It will actually coagulate within the thru hull fitting as the temp gets colder, and provide a nice sort of soft plug while keeping water out of there. Also, if vegetable oil is used, you won't be accused of polluting the marina like a normal oil or gas spill.
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post #82 of 110 Old 02-03-2014 Thread Starter
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Re: Extreme Cold

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When I was living aboard (Toronto winters). Some people would hang a 60 watt bulb and fixture next to each through hull to keep then nice and warm over the winter! I did this for a couple of winters and then realized that this technique wasn't necessary with the bubblers in our marina! The system they used had massive compressors and the entire slip would stay ice free.
Wow, that's a good idea. I wish I had thought about doing that in my Engine Compartment.

But, here in the US, I don't think they sell regular light bulbs anymore by law. All that you can buy anymore are CF, but I'm not 100% positive. But I think that is the way it is right now.
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post #83 of 110 Old 02-03-2014
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Re: Extreme Cold

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Wow, that's a good idea. I wish I had thought about doing that in my Engine Compartment.

But, here in the US, I don't think they sell regular light bulbs anymore by law. All that you can buy anymore are CF, but I'm not 100% positive. But I think that is the way it is right now.
They are not allowed to manufacture them anymore but there are a few years worth in the pipeline. I think though that a incandescent light bulb is way to fragile and short lived for me to use as a source of heat to keep a seacock warm, a golden rod type of heating element would be more reliable. Though we did once use them for heat in an outdoor cat's house during the winter. I don't think she (the cat) cared much if it worked or not, but the snow sure melted off the top of it.

Winterizing it just makes more sense, along with keeping cabinet doors in front of them open to keep warm air circulating around them.
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post #84 of 110 Old 02-04-2014
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Re: Extreme Cold

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But, here in the US, I don't think they sell regular light bulbs anymore by law. All that you can buy anymore are CF, but I'm not 100% positive. But I think that is the way it is right now.
There are efficiency standards for light bulbs now that pretty much mandate CFL or LED, but there are a lot of loopholes for specialty bulbs that are for outdoor or heating use.

But using a light bulb as a heating source for something that can sink your boat seems pretty cheesy.... The Easy-Bake Oven solution to boat winterization?

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post #85 of 110 Old 02-04-2014
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Re: Extreme Cold

No worries if you want to burn your boat down with using bulbs to heat in a confined space, CFLs, although generate no heat the integral ballasts do. And same goes of LEDs. You can put them closer to the sea cocks without as much risk of fire. Just a piont about the new wave of lighting and heat, I would never recommend using such a method.

Edit: IMHO, though that was a given.

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Last edited by Delta-T; 02-04-2014 at 12:40 PM.
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post #86 of 110 Old 02-04-2014
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Re: Extreme Cold

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No worries if you want to burn your boat down with using bulbs to heat in a confined space,
Can you cite an example where this actually happened?


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post #87 of 110 Old 02-04-2014
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Re: Extreme Cold

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Can you cite an example where this actually happened?
I edited my post for you....really? Do you really think an incandescent bulb can not start a fire?

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Last edited by Delta-T; 02-04-2014 at 01:21 PM.
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post #88 of 110 Old 02-04-2014
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Re: Extreme Cold

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Can you cite an example where this actually happened?
Here you go from the NFPA: https://www.nfpa.org/research/report...ses/electrical

"In 2011, an estimated 16,400 non-home structure fires reported to U.S. fire departments involved some type of electrical failure or malfunction as a factor contributing to ignition. These fires resulted in 13 civilian deaths, 243 civilian injuries, and $501 million in direct property damage. In 2007-2011, non-home electrical fires represented 13% of total non-home structure fires, 5% of associated civilian deaths, 13% of associated civilian injuries, and 21% of associated direct property damage.

Half (48%) of 2007-2011 reported non-confined U.S. home structure fires involving electrical failure or malfunction had some type of electrical distribution or lighting equipment as equipment involved in ignition. The leading other types of equipment involved in ignition were fan (6%), washer or dryer (6%), space heater (4%), air conditioning equipment (4%), water heater (3%), and range (3%).

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post #89 of 110 Old 02-05-2014
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Re: Extreme Cold

About 20 yrs ago, winter bubbling became fairly popular at our little sail club in Michigan. Since we were concerned about members jury rigging goofy heating within their boats, we made a rule limiting on board electric usage to no more than 100 watts.

We designed cheap convection heaters using a light bulb, for those who desired a little air circulation around things like their engine block. These heaters consisted of a cheap porcelain light fixture (the kind you see in closets or basements) mounted to a slightly larger piece of thin plywood for stability. Then cut out top & bottom of a large juice can to place over the bulb, which acted like a chimney. This was simply held in place a couple inches above the plywood by 3 or 4 thin metal brackets, probably cut from other juice can material. Not sure if this part worked, but someone came up with the idea of painting the juice cans flat black in an effort to absorb more heat from the bulb. We also wired these with something like a 10ft cord, so users wouldn't be burdened with trying to self wire the fixtures, or use short cords whose connections might fall into bilge water.

The juice can also provided some protection for the light bulb in case someone accidentally knocked it over. The contraption cost less than $5 but it's effectiveness was always questionable.

The more apparent problem using electricity in a bilge, is the obvious danger from an unexpected spark. Guess what, Gasoline fumes are heavier than air, and even the smallest amount will find their way to the deepest areas of a bilge.

That's why all approved marine electrical equipment is certified as "Ignition Protected". Our little $5 heater contraptions certainly were NOT "Ignition Protected" and neither is anything else you can purchase at "Home Depot".

Last edited by lightfoot; 02-05-2014 at 10:58 AM. Reason: shorten the post
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Re: Extreme Cold

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a cheap porcelain light fixture (the kind you see in closets
These are outlawed for closet use because of fires.

http://garages.about.com/od/closetst...ghts_rules.htm

"Surface-mounted or recessed fixtures are both permitted, but exposed (uncovered) light bulbs are not. "

Has anyone ever had a hot bulb get wet? I have and they shatter before the element sparks/burns out. All it would take is one drop of condensation and some combustible bilge fumes.

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Last edited by Delta-T; 02-05-2014 at 11:16 AM.
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