Mueller AT80 plate and frame heat exchanger rated at 2758 cfm of steam on the hot side and 981 gpm of water on the cold side. There are 62 plates with a total surface area of 542 square feet. Unit is used in excellent condition. NOTE: Serial # 205473-2, Part # 9816400, Manufactured in 1997. Gasket material for this unit is EPDM.