Dave, all the machines I own runs on 220 volt 50hz, no transformer needed...all american toploaders as long as for american appliances imported from US and sold from dealers have 220 volt power supply.
My Filter-flo was purchased in USA and was specifically requested to run 220 volt 50hz, infact 220 volt parts were manufactured in USA too ( in case of filter flos in Canada, my filter-flo machine is Made in Canada) for machines to be sold in Latin countries where they have 220 volt and so in EU market too...
Some machines imported directly from privates from USA of course do have 120 volt 60hz as you told if not requested or possible differently, not a problem, a transformer fix it all, hertz difference is not a problem, you do not even notice...as I could see in washing videos.
There was just a NIB Kenmore oasis on sale imported from a private last month... it was a 115-120 volt imported privately, he was selling it with a transformer included.... others do that because importing american machines privately if you have people who can ship from USA, relatives or friends, would cost less than buying one here....that's what we did years ago when we had our Filter-flo.
A price for an american machine is about 1500 to 1700 euros from dealers... Lots of money!!!
Regarding water heaters, everyone who purchase an american top loader or (double fill) machine ( top loaders agitator machines are getting so popular here) do connect them to gas heaters in lack of an hot water line, and it's rare you do not have it in proximity of laundry areas (no-one use electric heater anynmore as here in Italy is too expensive to run), in condos you connect them hot water line from the condo, otherwise you put a gas insta-heater...cheap to run and functional stuff...
My machines are connected to hot water line from condo heater, I get water from 60°c to 70°c hot.
In the new house I will have a gas heater for house heating that produces instant hot water (about 80°c), a Vaillant probably as we have at seaside house, have still to choose it.
But we are thinking to purchase also another wood furnace for house heating and hot water, my father has it in the other building of the farm (3 story depandance) where he is located, this huge thing produces 80°c water and store it in a tank with a 10% heat loss.... a tank last for about 3-4 days...
Wood consuption is hight though, but we have plenty wood available there....otherwise we can always run the gas heater.
We now have a huge gas tank grounded.....so gas last for months and months...
[this post was last edited: 3/2/2013-08:39]