using incorporated fans

Full Title

Sanitary or other accessories for lavatories (hand tools for cleaning the toilet bowl A47K11/10; seats or covers for closets A47K13/00; body supports, other than seats for closets A47K17/02; devices for preventing contamination of drinking-water pipes E03C1/10 ) > Special arrangement or operation of ventilating devices (ventilating rooms in general F24F) > ventilating the bowl > using incorporated fans