Henry cannot be used without his cloth filter. The filter does not collect any dust it simply stops the dirt collected inside the drum from going up into the fans of the motor. Using Henry without a filter would not only cause instant damage to the motor but would also invalidate any warranty. The filter has a plastic grid inside it - which stops it being sucked into the motor fans & also has a rubber seal around its plastic outer ring. This seal must be intact & fitted properly or Henry will loose suction.