Used 912 SQ FT Praj Industries horizontal 304L Stainless Steel shell & tube heat exchanger. 33" ID x 13'8" overall length. (354) 1" x 9'10" tubes, shell 10psiFV@158F single pass, tubes 66psi@131F two pass. National Board #13. Serial #06D058-H1463A. Built 2008. Past Use Rectifier Condenser II.