... air from bottom of back wall panels, with exhaust fan,air capacity:2200m3/h. Generator is with galvanized steel ... air from bottom of back wall panels, with exhaust fan,air capacity:3800m3/h. Generator is with galvanized steel ... SystemPre-filter, exhaust fiberglass filter.Control SystemPower supply switch, electrical outlet, fan operation and lighting switch. Technical Parameters of Mixing Room- ...