One or more techniques regarding an atmosphere controlling manifold are provided. For example, one or more embodiments can regard a manifold that can comprise a first channel connected to a first inlet port. The manifold can also comprise a second channel connected to second inlet port. Further, the manifold can comprise a third channel connecting the first channel, the second channel, and an outlet port. Additionally, the manifold can comprise a valve connected to the third channel and regulating fluid communication through the third channel. Moreover, the first channel, the second channel, and third channel can be defined within a body of the manifold.