16.7 sq. ft. type BEU, admirality tubes, steel shell horizontal heat exchanger. MFD by Doyle & Roth, Serial # 2612-2, NB# 10561. ASME code stamped for 150 psi @ 400 deg. F on both shell and tube sides. Shell 8" dia. x 6' long. Single pass on both sides. Tubes are 3/4" OD x 16 BWG x 6' long, positioned on a 15/16" triangular position. Mounted on legs.