Clean rooms are defined as especially constructed, environmentally controlled enclosed spaces with respect to airborne particulates, temperature, humidity, air pressure, air flow patterns, air motion, vibration, noise, viable (living organisms) and lighting.

Particulate control includes:
– Particulate & microbial contamination
– Particulate concentration & dispersion

Classifications of clean rooms?
Generally clean rooms are classified in to the following types as per different guidelines:
Schedule M: Grade A, Grade B, Grade C, Grade D
USFDA (US 209E): Class 1, Class 10, Class 100, Class 1000, Class 10000, Class 100,000
WHO 2002: Grade A, Grade B, Grade C, Grade D
EU GMP: Grade A, Grade B, Grade C, Grade D
ISO 14644-1: ISO-3, ISO-4, ISO-5, ISO-6, ISO-7, ISO-8, ISO-9
Britian (BS 5295): Class C, Class D, Class E or F, Class G or H, Class J, Class K
Australia (AS 1386): 0.035, 0.35, 3.5, 35, 350, 3500
Germany (VDI 2083): 1, 2, 3, 4, 5, 6

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