Used 198 Sq ft Doyle and Roth 304 Stainless Steel Horizontal Shell and Tube Heat Exchanger. (84) .75" OD x 12'L tubes rated 180PSI/FV@350F. Shell Rated 232PSI @ 410F, FV @ 350 F. Approximately 29" OAH x 172" OAL. Weight 1,961 lbs. Serial #S2765-2. National Board #21564. Built 2015.