Iso Class 7 Clean Room Air Change Rates

Within you ll find summarized approaches for determining cleanroom air change rates but not recommendations.

Iso class 7 clean room air change rates.

Iso class 3 500 750 air changes per hour with a ceiling coverage of 60 100. Iso class 2 500 750 air changes per hour with a ceiling coverage of 80 100. In an earlier post on air change rates for cleanrooms we outlined how to calculate cleanroom air exchange rates for iso 6 iso 7 and iso 8 cleanrooms. The requirement of number of air changes per hour for any clean room depends on the class of the room number of personnel working in the area and frequency of access the room.

This post addresses air change tables and calculations in iso 2 iso 3 iso 4 and iso 5 cleanrooms with unidirectional airflow. Iso 8 class 100 000 0 005 0 041 1 8 5 48. Iso 6 class 1 000 0 127 0 203 25 40 150 240. More air changes per hour are required for the better clean room class than the lower one.

Cleanliness of any clean room is maintained by the air changes per hour. Iso 7 class 10 000 0 051 0 076 10 15 60 90. In reality however you can reach an iso 6 clean room with 1 recommendation is 2 airlock. In theory for an entire room to reach iso 6 air cleanliness you need to enter the cleanroom via an iso 8 ante room then go through an iso 7 to finally get into the iso 6 as shown in the image.

Class iso 146144 1 federal standard 209e average airflow velocity m s ft min air changes per hour ceiling coverage. Calculating cleanroom air change rates for iso 1 5 in cleanrooms with unidirectional airflow air exchange rate is calculated by air velocity sampling.