Interblog,It does not look like anyone is going to answer your refrigerator
question instead they would like to sell you a refrigeration
system instead, at two to five times the cost of a refrigerator
. The small 12/24 volt refrigerators you suggested Isotherm
and Vitrifrigo are both Designed for recreational Vehicles not boats. Yes marine
stores sell the RV refrigerators but as far as I know none are really designed for most pleasure boats. You can look at both of these small RV refrigerator and see that they are designed to dispose or heat from refrigeration
out the back near top of cabinet or in an open area they are installed in. RV manufactures usually provide a vent in exterior to match a location near top of refrigerator.