Household appliance apparatus, household appliance having the household appliance apparatus and method for mounting a household appliance apparatus

A household appliance apparatus, comprising:

• a housing base unit having a first base portion being a sheet metal plate having an exterior side facing a supporting surface, said first base portion and a second base portion together defining a lower face of a household appliance, said lower face facing the supporting surface for supporting the apparatus, said first base portion having a first partial region defining a horizontal portion of said lower face, said first base portion having a second partial region extending upward from said first partial region, said first base portion and said at least one second base portion defining an intermediate space therebetween in at least one region at which said second base portion adjoins said second partial region, said intermediate space extending over an entire width of said housing base unit and being on said exterior side of said first base portion;
• and
• at least one supporting unit for contacting with the supporting surface, the at least one supporting unit disposed at least partially in said intermediate space, the at least one supporting unit having a form locking connection fastening portion engaging said first partial region, the at least one supporting unit having a screw fastening portion engaging said second partial region.