Used 560 Sq Ft Doyle and Roth 304 Stainless steel Horizontal Shell and Tube Heat Exchanger. Shell rated 275 PSI @ 650 F, FV @ 350F. Tubes rated 275 PSI @ 700 F, FV @ 350 F. Approximately 32" OAH x 267" OAL. Estimated weight of 4,519 lbs. Serial # S-2765-3. National Board # 21569. Built 2015.