We have engine drive cold plate refrigeration with a 125v condensing unit for backup when we are in marinas. The condensing unit is like MC1's, mounted on a shelf at the aft end of the port cockpit locker. There is a vent from the locker to the space under the seat at the aft end of the cockpit of our tiller steered boat. The vent is a 4" bronze deckplate with a screw in cover. Inside the hole is a 125v computer fan which runs when the compressor runs to force the hot air out of the locker. In nasty conditions we screw the plate in to seal off the hole. In the usual rain and wind the seat serves as a roof over the hole and protects it.
1988 PSC 34