Does your powered respirator mask still deliver the airflow it did when new? Most workers assume yes. The unit switches on, the fan hums, and that feels like proof enough. It is not. Filters load gradually over weeks of dust exposure. Batteries lose capacity with every charge cycle. Seals perish quietly out of sight inside the hose connectors. None of these failures announces themselves clearly, and the wearer rarely notices the drop. Under COSHH, employers must keep RPE in efficient working order
