Welcome to the CF Kaja.
It would likely be advisable to use the search function on the forum. There are a number of threads related to washing machines, or washing/dryer combos.
Terms to look for would include vent-less vs vented, and what types of power sources are available. If your boat is an American boat, then it's likely wired on a 110V 60 cycle system. It might be wired with a 110/220V system, if so there might be other options available. Many American domestic units are wired to a 30 amp 220V plug
. This is the American 220V system with the two hot legs, not the European style system with a hot leg and a neutral.
Just for comparison purposes West Marine
sells a washer dryer combo that is advertised to used 1300W of 110V power in both vent-less and vented configurations. They include exterior dimensions on the website.