An apparatus for forming plastic preforms into plastic containers, having a transport device which transports the plastic preforms to be formed along a predetermined transport path, wherein the transport device has a rotatable transport carrier on which a plurality of forming stations is arranged, wherein these forming stations each have blow-molding devices within which the plastic preforms can be expanded into the plastic containers by applying a flowable medium, and the forming stations each have application devices for applying the flowable medium to the plastic preforms, and wherein the apparatus has a feed device for feeding plastic preforms to be formed to the transport device, and a discharge device for discharging formed containers from the transport device, and wherein the apparatus has a clean room within which the plastic preforms or the plastic containers are transported,
- wherein
- the clean room is designed such that the plastic preforms are transported outside the clean room at least temporarily during their expansion.