A ventilation system (10) for installation in an aircraft passenger cabin comprises an air supply pipe (12), which has a plurality of air outlet openings (14) disposed in a distributed manner along its longitudinal axis (L). An air chamber housing (16) is connectable to the air supply pipe (12) at various positions along the longitudinal axis (L) of the air supply pipe, such that air-conditioning air flowing through the air supply pipe (12) is supplyable, through an air outlet opening provided in the air supply pipe (12), into the air chamber housing (16). A connection device (34) is designed to connect the air chamber housing (16) to an air supply device (36) for supplying air-conditioning air into the aircraft passenger cabin.