3. SANITARY REQUIREMENTS FOR VENTILATION, HEATING, LIGHTING
3.1 Natural, mechanical, mixed ventilation or air conditioning shall be provided in production shops and auxiliary rooms in accordance with the requirements of Sanitary Design Standards for Industrial Enterprises and chapters of SNiP “Heating, Ventilation and Air Conditioning. Design Standards”.
3.2 In shops with an open technological process the purification of supplied outside air from dust in mechanical supply ventilation systems shall be provided. Supply air intake shall be made in the zone of least contamination.
3.3 In rooms with considerable heat and vapor production, supply and exhaust ventilation with local suction, if necessary, shall be provided. In addition, each room should have natural ventilation, if this is allowed by the technological process. In this case, metal nets shall be installed on windows and shutters in the warm season.
3.4 Ventilation ducts and air ducts from technological equipment should be periodically, but not less than once a year, cleaned and disinfected.