Cleaner air and premises for the employees and temporary four-legged residents of the Penkta koja dog shelter. The local smart ozonation system is operating in the premises of the shelter’s veterinary clinic. It prevents the spread of unpleasant odours and protects against a large number of bacterial and viral pathogens, spread by airborne droplets and onto surfaces. The system works automatically and safely – it is regulated and controlled with the help of an ozone sensor in accordance with the requirements of hygiene standards.