Preventing legionella in HVAC systems

General information about legionella and legionellosis are first given. Authors then mention techniques and methods of prevention to avoid the increase and spread of legionella in air conditioning and ventilation systems.They include preventive measures such as correct design of the system allowing regular inspection, maintenance and cleaning, as well as methods of anti-bacterial control in ventilation systems. Such control may be based on different cleaning treatments of air filters (by immersion or spraying) and ducts (using a solution of antibacterial product, compressed air, UV rays).