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Products

FUME HOODS BASED ON AIRFLOW TYPES

Options based on Airflow:

Constant Volume Type, Low Constant Volume type, Auxiliary Air Type, Variable Air Volume (VAV) Type

CONSTANT VOLUME FUME HOODS

The constant volume fume hood is a basic model with interior baffles, movable front sash and Air foil. The fume hood generally operates at a constant exhaust volume with all of the exhaust air entering the hood through the sash opening. Closing the sash increases the speed of the air through the sash opening so that high face velocities are to be expected with the sash in the closed position.

AUTO BYPASS FUME HOODS

The Auto By-pass hood generally operates at a constant volume and is designed so that as the sash is closed, the air entering the hood is redistributed, thereby minimizing the high velocity air streams encountered in constant volume hoods. The by-pass openings above the sash and below the air foil reduce fluctuations in the face velocity as the sash is raised or lowered.

AUXILIARY AIR FUME HOOD

The auxiliary-air fume hood offers a means of providing half of the air for the fume hood exhaust from outside the laboratory, and limits the volume of the treated air removed from the laboratory.

VARIABLE AIR VOLUME FUME HOOD (VAV)

Variable air volume (VAV) fume hoods vary the amount of room air exhausted while maintaining the face velocity at a preset level. VAV hoods alter the exhaust volume using various methods. One method utilizes a damper that opens and closes based on airflow and sash position. Another method involves varying blower speed to meet air volume demands. When multiple hoods share one common exhaust blower, both methods may be utilized.

LOW CONSTANT VOLUME FUME HOODS (LCV)

Low Constant Volume fume hoods are very high performance hoods. These fume hoods have additional accessories like aerodynamic enhancements in design, restricted sash openings and small capacity blowers to improve containment efficiency at low face velocity.

Detailed specifications available on request.