Are the normal regulations and planning rules applied for system design (temperature > 55oC, no dead legs or stagnation, circulation loops, maintenance, monitoring, etc.) sufficient to control the presence of Legionella in the hot water systems?
Download Lin’s articles on Disinfection in the Publications section. None of the measures mentioned including maintenance or removal of deadlegs affect legionella colonization! Maintaining hot water temp at > 55oC is effective for a period of time only if a superheat and flush was performed previously.