With a delay start option you can schedule the machine to begin at a later time. You can also set the machine to wash at night if your electricity is cheaper outside of peak times.
With a lower noise level for drying there is less disruption and you could use the dryer at night.
With a bigger drum you can fit in larger items such as duvets, or do a big load at once.
The machine will analyse how much heat is needed in order to dry each specific load, therefore increasing efficiency and saving energy.
More weight capacity helps if you want to wash something heavy like curtains. A traditional household machine can hold around 6kg, so with a machine much bigger you may waste energy using it when only half full.
6.number of cycle programs
With a wider range of programs to choose from you can be more specific and choose the best, most economic program for your needs.