A tube and shell heat exchanger in accordance 1 wherein {TAIL ~ said burner} of said tube bundle and shell combination is adapted to project a flame in the direction of {HEAD ~ a burner outlet} and further comprises means for automatically controlling the size of the flame in response to demands upon said tube and shell heat exchanger for heat 
A tube and shell heat exchanger in accordance 1 wherein { TAIL ~ said burner } of said tube bundle and shell combination is adapted to project a flame in the direction of { HEAD ~ a burner outlet } and further comprises means for automatically controlling the size of the flame in response to demands upon said tube and shell heat exchanger for heat
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH