The LEGIOTEX-DEMO project will primarily impact on the market for water-based equipment for indoors climate control and water distribution systems within large public and industrial facilities. Legiotex Demo is based on the results of the Legiotex proposal. The general objective of the project was the development of a water filter (LegioTex®WATER) capable to inhibit the growth and proliferation of the bacteria belonging to the Legionella Pneumophila family in water-based climate control equipment and sanitary water distribution systems in risk of becoming a source for legionnaire's disease outbreaks in large public and industrial facilities. For developing the aimed filter, environmental-friendly bactericides were appropriately fixed onto nonwoven textiles, assuring a long lasting biocide effect and optimum mechanical properties. The filter was mounted onto a disposal cartridge for its quick replacement, and this within a metal housing to be easily installed in different equipments, to have an optimum fluid-dynamic behaviour and successful commercialization. The aim of LEGIOTEX-DEMO is to install the product prototype for the prevention of Legionella contamination in a demonstration installation of a representative facility in risk of becoming a source of legionnaire´s disease (a potentially fatal pneumonia-like infection) to corroborate the efficacy of the developed prototype.