Variable Air Volume (VAV)

Variable Volume (VAV) Fume Hood

LOC’s Variable Air Volume Fume Hood is specifically designed for use with exhaust control systems provided by other manufacturers that monitor and control the amount of air being exhausted from the hood. The use of these devices will allow air flow to adjust according to the position of the sash, as opposed to constant air volume systems. This ensures a constant face velocity is maintained while working and contributes to superior hood performance. This greatly reduces the operating cost of the system making you more energy efficient.


  • A lintel restricts the air intake to the front sash opening.
  • The exhaust volume can be varied by the VAV controls.
  • Equipped with a full view sash providing an unobstructed view of the hood interior.
  • Sash is glazed safety glass with full width flush PVC pull and includes a spring loaded sash stop.
  • Counterweight provides a one finger sash operation.
  • Hood entrance is framed with inward-angled members to minimize turbulence and provide smooth air movement at face velocities ranging from 60 to 150 FPM.
  • Stainless steel airfoil allows 1″ of airflow across the work surface when sash is in the closed position.
  • Double wall construction for ease of routing plumbing/ electrical lines.
  • Standard “Resin-Chem” interior liner with removable access panels on both sides.
  • Removable exterior side panels.
  • Lights are mounted above a sealed safety glass panel keeping corrosive fumes and hazardous vapors isolated.
  • Tube lights can easily be replaced through the top front


  • A variety of optional¬†service fixtures¬†are available from LOC for installation in the Variable Air Volume Fume Hood.
  • Mounting holes for service fixtures and electrical receptacles are pre-cut and capped when fixtures are not required.


Variable Volume (VAV) Fume Hood DimensionsVariable Volume (VAV) Fume Hood Specs

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.

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