Labconco Fiberglass 30 Laboratory Fume Hoods 3030005 - Manual (Page 21)

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Chapter 3: Getting Started
Sealing the Fiberglass 30
Hood to the Work Surface
When the hood has been set in place, ducted, wired, and
plumbed, it should be sealed at the work surface to
prevent spilled materials from collecting under the
walls of the hood. Materials such as silicone sealants
are recommended to seal the hood structure.
Certifying the Fiberglass 30
Fume Hood
The combination of your laboratory hood, exhaust
ductwork, and exhaust blower give you the flexibility to
change the airflow at the sash opening of your hood.
To determine the actual face velocity at the sash
opening, airflow velocity readings will need to be
taken. This should be done across the sash opening of
the hood in accordance with the Industrial Ventilation
Manual section on laboratory hoods. (See Appendix D
– Reference) Labconco recommends an average face
velocity at the sash opening of 80 to 100 feet per
minute. Consult Chapter 2 for proper airflow volumes
for your particular model.
The Fiberglass 30 Fume Hood has been tested per
ASHRAE 110-1995. All hoods achieve an “as
manufactured rating” of less than 0.10 part per million
(ppm) at 4 liters per minute (lpm); AM<0.10 (consult
Labconco for individual fume hood ratings). For “field
use” ASHRAE testing by a certified technician, contact
Labconco Customer Service.
! CAUTION: Natural gas should be used only in
the service fixture that has been pre-plumbed
with brass tubing. Sulfur content of the gas
could cause deterioration of standard copper
supply lines.