Get current pricing for Esex, 3,909 Sq Ft Esex Fin 3909 Square Feet Fin Fan Heat Exchanger, Rated 75psi @ 300 Deg F. (394) 1 304l-ss Tubes X 38', L. Cabinet Dims: 38', L X 14', W X 12 . Product Category: Process Equipment, Sub Category: Process Heat Exchangers: