cleanroom industry design thumb rule for required air velocity and air changes india tamilnadu chennai

Cleanroom Industry Design Thumb Rule

ISO Class	Controls	Air Velocity at table level in FPM	Air Changes Rate per Hour	HEPA Coverage as % of Ceiling
1	Stringent	70 - 130	>750	100
2	Stringent	70 - 130	>750	100
3	Stringent	70 - 130	>750	100
4	Stringent	70 - 110	500 - 600	100
5	Stringent	70 - 90	150 - 400	100
6	Intermediate	25 - 40	60 - 100	33 - 40
7	Intermediate	10 - 15	25 - 40	10 - 15
8	Less Stringent	3 - 5	10 - 15	05 -10

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Useful Information

   Federal Standard 209D Class Limits
   Federal Standard 209E Class Limits
   ISO Standard 14644-1 Class Limits
   Comparison between selected equivalent classes of
   FS 209 and ISO 14644-1
   Airborne classification in the EU GGMP
   Contamination Classification
   Particles in Outdoor Air
   Schedule of Mandatory Testing
   Schedule of Optional Testing
   International Standards Comparison
   Limits for Microbial contamination
   Air classification as per WHO 2002
   Air classification as per Schedule M
   Operations for Aseptic Preparation
   Operations for Terminally Sterilised Products
   Environmental Monitoring for Cleanrooms
   Air Classifications
   Special Requirements for ISO Class 3 Cleanroom
   Cleanroom Industry Thumb Rule