This code aims to provide information on the health effects, sources and distribution of the bacteria which leads to Legionnaires' Disease and the risk to people of being infected. Mention is also made of potential sources of infection in the workplace and home environment. It also provides advice on the correct design and installation of cooling towers and associated equipment, air-handling systems and water services. Workers required to inspect or maintain cooling towers, air-handling systems or water services, where aerosols could be inhaled, are provided with advice on the appropriate protective clothing and equipment. These workers should be trained in the procedures for carrying out testing and cleaning, including the appropriate handling of chemicals when they are required to be used.
Specific procedures apply when a person is required to work in a confined space.
Detailed advice on work in confined spaces and chemicals should be sought separately. Whilst this code specifically addresses Legionnaires' Disease and the prevention and control of the Legionella bacteria, the recommended 'good housekeeping' procedures would effectively minimise the risk of significant contamination with other bacteria and microbial organisms such as algae, fungi and protozoa. The safety procedures in this code are also appropriate for inspecting and maintaining domestic air-coolers, water services and spas which are commonly found in the home environment.