Unused 4600 sq ft (bare), 99,290 sq ft (extended) Carbon Steel Fin Fan Heat Exchanger. Rated 150 PSIG @ 255F. (358) 1” SA-214 Carbon Steel Tubes x 50’L. 3 Passes, 1 section. (3) 25 HP Fans. 1.711 MBTU/HR. Mfg by SmithCo. Built 2004. OAW : 14'2", OAL: 51’5”.