What recommended (ACH) air change per hours for pharmaceutical clean rooms class B, C ,D ? is there any references ?

Question added by Amr Ibrahiem Hussien , senior HVAC Engineer ( Design - maintenance - construction ) , petromaint
Date Posted: 2015/10/21

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by Asif Latif , Senior electrical mv lv technician , Saudi bin ladin operation and maintenance clock. Tower haram

FDA guidelines only specify a minimum of air changes per hour for controled areas without prividing any specifics.

changes rate to for diffrent class

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