Exhaust duct connects to the fume hood with a debris screen at the junction and transitions as required per lab drawings. The exhaust duct matches the venturi valve neck size unless labeled otherwise on plan and extends through the ceiling. A sound attenuator is positioned upstream of each venturi exhaust valve along the duct run.
HOOD FLOOR CEILING EXHAUST DUCT TO BE SAME SIZE AS VENTURI VALVE NECK SIZE VENTURI VALVE UNLESS LABELED OTHERWISE ON PLAN REFER TO LAB DRAWINGS FOR FUME HOOD CONNECTION SIZE. PROVIDE TRANSITION. PROVIDE DEBRIS SCREEN AT DUCT CONNECTION TO FUME HOOD. SOUND ATTENUATOR UPSTREAM OF EACH VENTURI EXHAUST VALVE.
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