Used 8828 SQ FT Praj Industries horizontal 304L Stainless Steel shell & tube heat exchanger. 81" ID x 22' overall length. (2286) 1" x 14'9" tubes, shell 10psiFV@160F single pass, tubes 66psi@130F two pass. National Board #23. Serial #06D058-H1461. Built 2008. Last use Rectifier Condenser I.