There is no fixed standard for the air exchange times of the four grades A, B, C and D in the new GMP purification workshop (clean room and clean room), because the air exchange times will be affected by many factors, such as the size, shape, height, air supply mode and filter type of the clean room.
generally speaking, for one-way flow cleanrooms, the ventilation times of Class A and Class B cleanrooms should be above 1 times/hour, Class C cleanrooms should be above 5 times/hour, and Class D cleanrooms should be above 3 times/hour. For turbulent clean rooms, the ventilation times of Class A and Class B clean rooms should be above 2 times/hour, Class C clean rooms should be above 1 times/hour, and Class D clean rooms should be above 5 times/hour.
It should be noted that these air changes are only reference values, and the actual air changes need to be calculated and adjusted according to specific conditions. At the same time, for different grades of clean rooms, different air treatment and environmental control measures are needed according to the specific production process and product quality requirements.
SICOLAB xige-laboratory system engineering construction service provider