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Chapter 2: Prerequisites
Location Requirements
The fume hood should be located away from
traffic patterns, doors, windows, fans, ventilation
registers, and any other air-handling device that
could disrupt its airflow patterns. All windows
in the room should be closed.
Support Requirements
DO NOT install the fume hood on a cart, dolly,
or mobile bench. ALL Protector XStream Hood
installations must be permanent and stationary.
The supporting structure usually consists of a
base cabinet and chemically resistant work
surface.
Exhaust Requirements
The exhaust duct connection has been designed for 12" nominal
duct (12.75" OD) to allow for minimum static pressure loss while
operating at 60 to 100 fpm face velocities. The 12" diameter
exhaust duct also allows for proper transport velocities away from
the hood with minimal static pressure loss. Should higher
transport velocities of 1000 fpm to 2500 fpm be required, simply
install a reducer after the exhaust outlet. The exhaust volume and
fume hood static pressure loss are listed for each hood model at
two sash heights and for face velocities of 60, 80 and 100 fpm.
When sizing the exhaust requirements, the choice must be made
for sash height and face velocity.
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