Add Air Hood
LOC’s Add Air Fume Hood provides added economy through the use of a front mount “add air plenum” that can supply up to 70 percent of the total Hood air volume requirement from an outside source.
The static pressures listed above are for the hoods only. An appropriate amount will need to be added to this figure to compensate for the pressure drop through the duct system. The total pressure drop through the hood and the duct system must be known to select the proper exhaust blower.