Abstract: A gas conditioning assembly comprising a first block structure and at least a second block structure is disclosed. A first gas flow passage and a second gas flow passage extend within the first block structure. The first gas flow passage is adjacent to the second gas flow passage. The second block structure comprises a reservoir housing block and a reservoir yoke. The reservoir yoke comprises at least one gas reservoir within the reservoir housing block. The second block structure further comprises a nonplanar sidewall adjacent to the first block structure. The nonplanar sidewall comprises a plurality of recessed contours and a plurality of grooves extending along the nonplanar sidewall. Individual recessed contours are in thermal contact with adjacent surface mount components. Individual grooves are in thermal contact with gas line tubing sections extending from the first block structure.