Apparatus (1) for additively manufacturing of three-dimensional objects by means of successive layerwise selective irradiation and consolidation of layers of a build material (13) which can be consolidated by means of an energy beam, comprising at least one module (2) moveable between at least two positions along a travel path, wherein a stream generating unit (6) is configured to create a stream of process gas (7) onto the module (2) at least partly along the travel path (5) of the module (2) between the first and the second position (3, 4).