To ensure that you make the right choice when removing asbestos-containing dust or H-class certified dust, use the Nilfisk-ALTO H-class safety vacuum cleaners. The built-in flow sensor and acoustic warning signal monitor the airflow in the suction hose, ensuring it does not drop below 20 m/s. All H-class vacuums are delivered with a individually tested and certified filter. All Nilfisk-ALTO H-class vacuums come with safety filter bags for secure and dust-free disposal of the collected material.