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<div class="moz-cite-prefix">I don't recall seeing insulation in the
DW2000 either. Perhaps Phil will chime in on this? It is
possible that being so compact, the surface area of the DW hull is
small enough that the contained heat loads can keep up to the
moisture production. Also, those are certified through GL, and as
such may have different requirements than ABS's 30% - 70% RH. Can
anyone speak to the GL rules on this? I can't see avoiding a 100
% RH environment, and the consequent condensation, when submerged
in 5°C water without either insulating or employing dessicants to
remove the moisture. Immediately next to the hull, it will always
be colder, so you may get condensation on the hull despite being
within humidity limits on the cabin air on average. I was
thinking that a cylindrical pressure hull would be relatively
simple to insulate though, with something like AP Armaflex sheet
material. You wouldn't even necessarily need to apply at 100%
coverage, but rather just enough to reduce the heat loss to meet
the 70% RH limit at whatever your cabin temperature is. (14°C -
30°C are the recommended temperature limits, but that's not
actually a rule under ABS UWVS). Insulating just the large
cylindrical surfaces between frames might be sufficient. In my
own design, insulation is a necessity - otherwise I won't be able
to keep my coffee hot.<br>
<br>
Sean<br>
<br>
<br>
On 2017-02-15 17:41, hank pronk via Personal_Submersibles wrote:<br>
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<blockquote cite="mid:eAD7cfi41ym4seAD8cYDJu" type="cite">
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<div><span>Sean,</span></div>
<div dir="ltr" id="yui_3_16_0_ym19_1_1487205274876_5828"><span>I
can not remember the temperature over the length of a
typical dive. I would estimate 10C after 1\2 hr at 100
feet. When I dive Kootenay lake it is probably 5C </span></div>
<div dir="ltr" id="yui_3_16_0_ym19_1_1487205274876_5828"><span>I
wonder how DW's manage, they dive all over the world and I
am sure in the winter.</span></div>
<div dir="ltr" id="yui_3_16_0_ym19_1_1487205274876_5828"><span>Hank</span><br>
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