An additive manufacturing machine includes a plurality of subsystems, such as a condensate evacuation subsystem for removing byproducts of the additive manufacturing products near a powder bed, a closed loop subsystem for cleaning contaminants from sensitive machine components, and/or an electronics cooling subsystem for cooling an electronics compartment. Each subsystem may include a dedicated gas circulation loop that is operably coupled to a gas circulation device for urging a clean flow of gas to each of the subsystems to perform a particular function.