These and {HEAD ~ other objects} of {TAIL ~ the present invention} are achieved by providing a gas fired tube and shell heat exchanger in which a gas fired burner projects its flame directly into the inlet end of a tube bundle and the heat from the flame flows directly through the tube bundle 
These and { HEAD ~ other objects } of { TAIL ~ the present invention } are achieved by providing a gas fired tube and shell heat exchanger in which a gas fired burner projects its flame directly into the inlet end of a tube bundle and the heat from the flame flows directly through the tube bundle
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH