This part of BS8489 describes tests and specifies requirements for industrial and commercial watermist systems for the protection of industrial oil cookers. This part of BS8489 does not cover external conveyors, fines boxes, oil transfer equipment or supplementary exhaust duct protection. The tests and requirements given in this part of BS8489 apply only to the specific fire scenarios described, i.e. with no obstructions between the watermist nozzles and the oil surface when the hood is in either the raised or lowered position. Configurations with obstructions are not covered in this part of BS8489. This part of BS8489 is applicable to the protection of the industrial oil cookers only, and does not include the protection of other equipment such as exhaust ducts, heaters, heat exchangers and food processing areas. Figure1 Diagrammatic arrangement of watermist fire protection for industrial oil cookers Key 1 Stack 2 Hood 3 Conveyor 4 Oil bath 5 Fines box