Large apparatus or complex set-ups may require the use of a Fume Hood specifically designed to meet these requirements. The Walk-In Fume Hood has two vertical rising sashes that allow you to roll in large equipment or portable work stations.
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 chemically fumed hood and the duct system must be known to select the proper exhaust blower.