Are there any signs or conditions in your fume hood?
 

• There is no indication that the exhaust has started

 
The following accidents have occurred as a result of not taking precautions and leaving it alone.
 
『An exhaust fan on the roof of the four-story building ruptured and damaged debris fell to the ground.
Because there were no people around, no one was injured.』
 
 
This accident, which could have been a catastrophic event that could have resulted in injuries if the debris had hit a person, can be reduced by taking the following steps to reduce the probability of it occurring.