Hi,
We are proposing a IAQ flush out procedure for our facility which consist of a lot of FCU’s. Due to the FCU’s the flush out procedure is excessively long. Hence our service providers are proposing an alternative, which would be using an exhaust system with air scrubbers. Though the fresh air supply to certain rooms are only 200CFM the capacity of the exhaust system is 4000 cfm. As the fresh air supply is lower than the exhaust system, will this cause any pressure damage to the ACMV system.
Moreover is this method in compliance with the LEED requirement? Appreciate your suggestions.

Also would like to know why is it required to maintain an internal temp of 15deg C during Flush out as most of our ACMV systems are designed to maintain an internal space temperature of 24deg C.