Bacteria pathogenic to humans and present in water and sludge. It multipliesmainly at temperatures varying between 32 °C and 45 °C. This bacterium can cause Legionnaires' disease. The most serious form of this disease, known as Legionnaires' disease, is characterized by a lung infection, namely pneumonia.
In co-ownerships, most water heaters (electric or gas) are installed within the apartments. In such a case, this device is an integral part of the private portions of the building. Each co-owners therefore has the responsibility to ensure the proper functioning, by checking (notably) any signs of dilapidation, and, if necessary, by replacing it at its own expense. Failing to do so, in the event of a breach, a co-owner could be held liable for any damages to the common areas of the building, as well as to the private portions owned by other co-owners, up to the amount of the deductible provided for the syndicate's insurance coverage.