Stainless Steel Tubes and Copper Fins The ultra-clean A33 series is appropriate for applications that employ deionized water The CENDEN A33 Series Heat Exchanger couples an efficiency approaching that of our all-copper A23 design in a high-reliability 17.5" x 9.0" heat transfer area. Thermal capability ranges up to 120 Watts / ÂșC, depending on configurationEach A33 Unit utilizes:CENDEN's ...