The Pentair BioShield UV System delivers a reliable solution to help maintain safe and efficient pool operation. BioShield low-pressure UV lamps offer up to 12,000 hours of continuous operation and reduce chlorine usage by up to 50 percent, while eliminating chloramines to improve the air and water quality of aquatic facilities. The unit provides instant and ongoing protection against chlorine-resistant microorganisms such as Giardia and Cryptosporidium. The system has received NSF approval to Component Certification Specification# 18325, as a water conditioning device suitable for chloramine reduction in most commercial swimming pool applications. http://www.pentaircommercial.com, (800) 831-7133