Absolutely the Face velocity changes with the work area set-up. This is why I
like to make sure the air flow away is maintained at a minimum. Most grossing
stations have large working area and often the flow away from the grosser is
not checked, just the vent opening draw. Most important is to
Face velocity is simply the airflow rate in CFM divided by the area of
the hood opening in square feet.
A smaller opening at the same flow rate gives a higher face velocity.
Titanium tetrachloride in a small plastic squeeze bottle can be used to
generate smoke.
On 3:59 AM, WILLIAM DESALVO
We use a company called C-Scan Technologies, Phoenix, AZ. The way they test all
our gross dissection stations is by testing for directional or smoke
containment and face velocity. We also check th they external pathway is clear
and if the unit has a filtering system, the filters are changed
