Used 4314 sq ft (Bare), 99920 sq ft (extended) Fin Fan Heat Exchanger. Rated 75 PSIG @ 250F. (294) 1" SA-214 Carbon Steel tubes x 56'L. Cabinet dims: 56'L x 15'4"W x 13'H. (3) Electric motors 40HP 1750 RPM TEFC. 34.15 MBTU/hr. Mfg by SmithCo. Built 2011.