Calling Isotherm SP Owners . . . .

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Paul Cossman

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Jul 25, 2004
362
Hunter 42 currently in New Zealand
I am ready to install a new refrigerator unit in my boat, and it's now down to an Isotherm SP unit or a regular fan-based air-cooled unit (by Frigotherm). Some Isotherm SP owners have been kind enough to give me their own experiences, but they have generally been in temperate climate areas, not the warm-water tropic areas.

Specifically, I am wondering how the SP units perform while at anchor in calm anchorages in the warm water tropic areas. Anybody have any experiences in these areas with them? How did they perform? Any observations on increased power consumption, or decreased cooling ability, vs. air-cooled units in the same environs?
 
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Steve Dion

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Dec 2, 1999
15,184
Hunter Vision-36 Rio Vista, CA.
Paul: If we think about this from a "logical" standpoint, the air temp in your boat will usually be a lot higher than the water temp. If you place your compressor in a cabinet the heat buildup will be very high. Even in the tropcial climes you will not be seeing 85 deg. water, but you may be seeing 95+ air temp.

The SP unit will not heat out your cabin and will not make noise. I can personally recommend these units from our experiencce with ours on the Hunter Vision 36.
 
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Paul Cossman

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Jul 25, 2004
362
Hunter 42 currently in New Zealand
Steve, what you say makes a world of sense. I have been thinking about it since your first reply to my first query. I guess my question is this: if my boat sits immobile in a quiet anchorage for hours, and I am using an Isotherm SP unit, will it warm the tropical (86 degree Fahrenheit) immobile water in my galley sink through-hull to the level that the temperature exceeds that of the ambient air temperature (plus a fan)?
 
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Steve Dion

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Dec 2, 1999
15,184
Hunter Vision-36 Rio Vista, CA.
Paul: I spoke with the factory rep and he indicated that it works even when you are on the hard. Considering that most of these compressor are in an enclosed compartment (even if you vent them), I think you would find that the water temp will be a constant and will cool better than the other options.

Isotherm claims that there is a natural circulation that occurs in the fitting. I suggest that you contact their reps and see what they have to say.
 
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paulcossman

Steve Dion said:
Paul: I spoke with the factory rep and he indicated that it works even when you are on the hard. Considering that most of these compressor are in an enclosed compartment (even if you vent them), I think you would find that the water temp will be a constant and will cool better than the other options.

Isotherm claims that there is a natural circulation that occurs in the fitting. I suggest that you contact their reps and see what they have to say.
Click to expand
Thanks, Steve. I like everything you've had to say about this unit, and I like what I've read as well. Your suggestion is a good one: I'll contact their reps and take it from there. Thanks again,
Paul
 
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