Is it required to run FCUs or any other
units which just re-circulates the room air during flush out process?

If it is not required then we don’t want
to put the MERV 8 filters there, am I right?

Then for this case can we avail this credit by providing MERV 8 rated filters in all Treated fresh air units and also in the AHUs that distributes the fresh air to all the interior spaces through treated fresh air units?