Used 197.42 Sq Ft 304L SS Fin Fan Heat Exchanger. Mfg Chart. Model H72. 197.42Sq Ft (bare), 4237 Sq Ft (extended). (86) 1" OD tubes - 4-pass. Rated 75PSI@300F. (1) Force D 10HP Fan drawing 6600 lbs. National Board. Built 2015. Includes 124 Sq ft CS Heat Exchanger tube bundle. (54) 1" OD Tubes rated 75PSI @300F. National Board. Built 2015. Past use LFTL Distillate Condenser and Diesel Fractionator air Cooler.