Using the ASTM-Set it is possible to conduct an Air Change Rate test in line with the applicable Standards (EN ISO 12569 and ASTM 741). It is recommended to use the ASTM-Set in all legal issues. It consists of
18 empty plastic syringes with white label and red cap
4 syringes for sampling outdoor or in adjacent rooms
4 syringes for local samples in zone of concern at start of test to prove complete mixing
5 syringes for nominal ACR test
4 syringes for local samples in zone of concern at end of test to prove complete mixing
In addition to the Standard- and Combi-Set procedure it is required to take local samples before and after the nominal ACR test to confirm complete mixing. The local concentration differences must not be higher than 10% of the mean. Also the minimum time interval between samples is defined.