We have an old system which by all accounts should not work. Sort of
like the bumblebee which should not be able to fly. It is a combined
110 AC system with an engine driven system. We run the system twice a
day for about 40 minutes. Since it is an old system, it could
probably use more insulation, and it is such a large space that it is
hard to keep on top of what's actually in there. Plus it isn't on a
thermostat so we have to be there on the boat to run it. We have to
be very careful how long we run the engine driven or the compressor
will freeze up - the 110 system can be go a bit longer without a
problem. I'm sure it is a holding plate system.

grandma Rosalie

S/V RosalieAnn, Leonardtown, MD
CSY 44 WO #156
http://home.mindspring.com/~gmbeasley/id2.html