- Prewash function: Duplex products have the option of disabling detergent solution recovery for prewashing, a huge benefit when cleaning very dirty floors.
- Brush pressure adjustment: the brush pressure can be adjusted for better cleaning results.
- Duplex machines have special brushes for every type of flooring and dirt:
- Black brushes for cleaning very dirty floors;
- Yellow brushes for delicately cleaning carpet tile and carpets;
- Very abrasive Tynex brushes;
- Scotch-Brite brushes with a slightly abrasive polishing action, especially suited for smooth/linoleum floors.