My condo had only one rated outlet to plug my washer/dryer into.  Bosch was the only brand I found that plugged one appliance into another, therefore only using one outlet.  Refused to by a stacked washer/dryer.  So happy.  Washer uses little detergent, but cleans wonderfully.  Very quiet.  Only downside, too many washing options to choose from.  Read the manual!!!!!