Rendering of the SAM airlock into the Mars Yard, SAM at Biosphere 2

SAM will incorporate a regulated pass-through airlock for movement between the Mars yard and the entry to the crew living quarters. This airlock will not work with a vacuum, rather it will move a specified quantity of air from a compressed source into the airlock such that most of the volume will be exchanged. The air released will be recompressed, HEPA filtered, and recycled for minimal loss of air.