Personally I wouldn't bother fitting one.
They are not designed to fit inside a cupboard unless they are a built in appliance costing lots of cash, they need a lot of ventilation otherwise.
Also they weigh a lot, probably 30 pounds at a guess, I took mine out of the last caravan because it would sometimes trip the bollard, despite having it replaced the new one did the same.
Even allowing for the current consumption it would trip, which was at least 1200watts from memory, so not very efficient.