In large structures with natural ventilation, propel fog the length
of the structure with the first fan row no more than 30' from
the end wall. The first fan should be:
- centered along the end wall OR
- placed no more than 30' from the side wall, with additional fans
in the row equally spaced no farther than 60' apart.
Lengthwise, fans should be equally spaced and no farther apart than
60'. All fans should be equipped with oscillation, sweeping 360°.