An additive manufacturing machine (900) includes a plurality of subsystems, such as a condensate evacuation subsystem (940) for removing byproducts of the additive manufacturing products near a powder bed, a closed loop subsystem (960) for cleaning contaminants from sensitive machine components (964), and/or an electronics cooling subsystem (984) for cooling an electronics compartment (980). Each subsystem (940, 960, 984) may include a dedicated gas circulation loop (942, 966, 986) that is operably coupled to a gas circulation device (944, 968, 988) for urging a clean flow of gas (946, 962, 990) to each of the subsystems (940, 960, 984) to perform a particular function.