We have installed a facility to additionally inject sodium hypochlorite in proportion to the amount of water sent from the water tank. We also introduced a "chlorine dioxide generator" that operates in an emergency according to your wishes. It is a facility that safely generates and injects chlorine dioxide, which is effective against Legionella and other hypochlorite-resistant bacteria. Since sensors for chlorine and chlorine dioxide are also installed in each, it is possible to perform appropriate concentration control.