A lamina stack for a two-pass evaporator composed of laminae for converting two media mass streams from a liquid state into a gaseous state, comprises at least two laminae. The communications interface incorporates a universal serial bus protocol to create a standard, open interface providing a low cost, reliable communication link. Branch ducts, and primary ducts with which they are fluidly connected, may be made from materials designed to withstand exhaust gases that have a high temperature, are corrosive, andor include volatile solvents. The apparatus may be initially purged of ambient air and oxygen prior to filling the vessel with contents further reducing premature oxidation by reducing a substance’s oxygen contact as substances initially enter the vessel.