{HEAD ~ A total gas stream} is subjected to initial sensible cooling along {TAIL ~ a moisture impervious surface} of a heat exchange element 
is subjected along
{ HEAD ~ A total gas stream } is subjected to initial sensible cooling along { TAIL ~ a moisture impervious surface } of a heat exchange element
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH