Below is a quick guide to the number of air-changes required for each room classification under the ISO 14644-1 and Fed Std 209E

ISO 14644-1

Class 8 require 5-48 Air Changes Per Hour

Class 7 require 60-90 Air Changes Per Hour

Class 6 require 150-240 Air Changes Per Hour

Class 5 require 240-2480 Air Changes Per Hour

Class 4 require 300-540 Air Changes Per Hour

Class 3 require 360-540 Air Changes Per Hour

Fed Std 209E

100,000 require 5-48 Air Changes Per Hour

10,000 require 60-90 Air Changes Per Hour

1,000 require 150-240 Air Changes Per Hour

100 require 240-480 Air Changes Per Hour

10 require 300-540 Air Changes Per Hour

1 require 360-540 Air Changes Per Hour

Keywords for this Post

ISO 14644-1, Fed Std 209E, ISO 14644-1 air changes, Fed Std 209E air changes