and large-scale extraction work where maximising airflow is critical

BP did their homework and get an "A" from me

Supply & installation of external HD pump-out system

and exhausting fumes and dust

North 7580P100 Particulate Cartridge (1 pair) Base UOM:EACH and large-scale extraction work whereGreat for mould P100 Fits all North air purifying respirators This North pancake cartridge is classified P100, and is 99. 97% efficient against all particulates, including those that contain oil based aerosols. P100 99. 97% filter efficiency for protection against particulates, including those that contain oil based aerosols. Fits North APR facepieces No adapters needed. Fits directly onto North half masks and full facepieces.