Sanitization of Ventilation and A/A systems (svaa)
Ventilation and air conditioning systems must create a psychologically satisfactory environment and hygienic indoor air. Air conditioning systems must be designed, designed, used and maintained in the best conditions, in such a way that they do not present a health hazard or environmental or thermal discomfort and do not produce odors. The use of air in recirculation is only advisable if it can be guaranteed that the concentration of air in recirculation is only possible.