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Go Back   SailNet Community > On Board > Gear & Maintenance
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  #41  
Old 09-25-2008
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Quote:
Originally Posted by CharlieCobra View Post
I've been eyeballing the Dickinson Propane units for Oh Joy as well. I sail regardless of the weather and it'd be nice to have some heat besides the propane oven on occasion. Seeing as my fuel tank is only 25 gallons, propane's good for me.
Charlie, I think you'd like it. We used to do as you do and take the chill off with the oven, but that is where the problem Val mentioned comes in: moisture. When we'd do a lot of pre-heating and baking (all to warm up the boat) our cabin would turn into a rain forest from the moisture that is a by-product of propane combustion. It all gets dumped into the cabin because the stove/oven is not vented outdoors.

Check the price at Go-2-Marine. Two years ago I got the entire package (with chimney guard and flue guard) for about U.S. $600.
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  #42  
Old 09-25-2008
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Yep, the last time I checked it was just over $700 or so. I know what ya mean about condensation from the oven. I've just gotta find a place to mount it.
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  #43  
Old 09-25-2008
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Quote:
Originally Posted by JohnRPollard View Post
....In a worst case, water could come down the chimney during a roll, but it would not flood the boat since the combustion chamber is sealed to the interior. Probably wouldn't be good for the heater, though.

Fortunately, there is a simple remedy for folks heading off soundings. The flue guard can be removed and a 6" stainless mixing bowl and gasket can be easily fitted over the flue to make it watertight. But then you can't use the heater while it's sealed up....
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  #44  
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Quote:
Originally Posted by JohnRPollard View Post
...All the air for combustion is drawn from abovedecks and all the exhaust from combustion is simillarly vented to the exterior. No moisture issues at all. Very dry heat. Self cooling (or, heat-limiting) chimney. Pretty slick.
So the unit cannot be used without a fan to draw-in outside combustion air. Does the fan go on automatically when the unit is turned on? I noticed a little switch on the front.
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  #45  
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Dickinson propane

Lo,
I don't think the fan is for combustion. It is used to blow the warm air downward in order to circulate it better. The combustion works without any electrical power.
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  #46  
Old 09-26-2008
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Quote:
Originally Posted by LoTech View Post
So the unit cannot be used without a fan to draw-in outside combustion air. Does the fan go on automatically when the unit is turned on? I noticed a little switch on the front.
Steve's correct... the fan is not required for combustion. It recirculates cabin air across the heat exchanger. The air is discharged above the glass window and directed towards the sole. The greatly increases the effectiveness of the unit.

Combustion air is drawn in naturally, and once the fire is established, the air is preheated as it passes on the outside of the combustion byproducts in the inner flue.
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  #47  
Old 09-26-2008
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Looks like they separated everything...now you buy the flew kit and stove separate...looks like about 1200.00 for the Antarctic setup.
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  #48  
Old 09-26-2008
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Quote:
Originally Posted by JohnRPollard View Post
Val,

I'll agree with you about propane for long distance/offshore or real cold climate heating. Diesel would be better for that.

But as for the moisture issue with propane, the reason I and several others speak so highly of these Dickinson units is that they have a sealed combustion chamber fed by a double-walled chimney. All the air for combustion is drawn from abovedecks and all the exhaust from combustion is simillarly vented to the exterior. No moisture issues at all. Very dry heat. Self cooling (or, heat-limiting) chimney. Pretty slick.
It is, and I would have a Dickinson for coastal/domestic work, because its design completely compensates for the two shortcomings of propane: 1) it's wet, and 2) it's available in a bizarre number of fittings internationally, when it's available at all. So despite the very nice and proper stack, propane's out apart from the stove, which is a Force Ten three-burner oven I really like.

Other than that, I love and use propane a lot.
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  #49  
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Quote:
Originally Posted by Stillraining View Post
But what Im really after is self sufficient heat ..ie no power consumption required... or very very little anyway..and of course the cheapest BTU for the buck that makes the most sense in terms of weighing out all the pros and cons.
I hear that. I already have forced air heating via my Mermaid Marine Air heat pump...but it eats 17 amps at start-up and the March pump is 115 AC...a super pump, but offshore A/C and heat from electrical sources are very expensive in electrons. If I'm on shore power, I don't think twice...the water can be 40F/5C and I can get heat from it.

I need either a "whole boat solution" running on diesel, or a "zone" solution (also diesel) in the form of a saloon bulkhead heater. I am leaning toward a whole boat solution not just because we'll be liveaboards, but because keeping the boat warm and dry is part of keeping it uncorroded, as condensation on a metal boat is a bigger problem than on a F/G.

I've even considered capturing waste heat from the engine and using little block heaters and fans, but this set-up is likely too fragile for the kind of sailing we'll do.

The strange thing is that the pilothouse gets quite warm in the daytime from the sun and the engine heat (when running), but the aft cabin and the saloon (both down three steps) remain cool, unless the stove is running. So maybe I need a ceiling fan in reverse?

The layout of the boat is
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  #50  
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You guys are going to love this book I mentioned...
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