Founded in 1960 near Lyon, France Air manufactures the CIRCÉ circular and REF rectangular fire damper ranges with the EVO actuator family — thermal fuse, solenoid and motorised reset versions — alongside a wider ventilation, smoke-control and air-treatment catalogue. The dampers are certified CE and NF, classified up to EI 120 S at 500 Pa and declared against EN 15650, EN 1366-2 and NF S 61-937-5, combining CE marking under the harmonised fire-damper standard with the AFNOR NF mark that French DAS require. More than 540 people work for the business.