Pharmaceutical Good Manufacturing Practice Regulations Article 10

All operation areas in Chinese herbal medicine factories shall be equipped with appropriate illumination and ventilation facilities; where necessary, aforesaid areas shall also be equipped with appropriate facilities for the regulation of temperature and humidity.Each production and processing area shall, in accordance with its air purity requirements, be equipped with appropriate air filtration systems, including pre-filters and particulate filters.In areas for the storage of raw materials, products, semi-finished or intermediate products, and areas where products are manufactured, processed, re-packaged or packaged, conditions conducive to the prevention of quality degradation shall be maintained.