The pipe of fume hood should upward through the roof. There should be water pipe and water sink in the fume hood.
The fume hood is the main safety in lab. In order to control harmful material leakage and keep the experiment working properly, the face velocity must be controlled efficiently.
PERCHLORIC acid heated above ambient temperatures shall only be used in a chemical fume hood specifically designed for its use and identified as follows: for PERCHLORIC acid OPERATIONS.
As I said, it's a particularly hazardous substance, this is worked with in fume hoods.
Baffles: Baffles providing controlled air vectors into and through the fume hood shall be constructed from the same material as the liner.
The pump exhaust should lead to the open air or a fume hood.
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