-LEV stands for Local Exhaust Ventilation, which is an industry standard to ventilate toxic air efficiently. This system is made of three parts: a hood for allowing contaminant clouds to enter the LEV, ducting which transfers air and the contaminant from the hood to the discharge point, and attached to a centrifugal fan with 780-1000 cubic meter (of what?) per hour.
+LEV stands for Local Exhaust Ventilation, which is an industry standard to ventilate toxic air efficiently. This system is made of three parts: a hood for allowing contaminant clouds to enter the LEV, ducting which transfers air and the contaminant from the hood to the discharge point, and attached to a centrifugal fan with 780-1000 cubic meters per hour flow rate.
## Activated Carbon
@@ -159,4 +159,6 @@ If you take the proper safety precautions of a proper gas mask and extraction fi
2. [Removal of VOCs from polluted air](http://beta.chem.uw.edu.pl/people/AMyslinski/nowy/zarzadzanie_01/literature_HWW/02.pdf)
3. [Evaluation of GAC filters to remove VOCs](https://www.isiaq.org/docs/papers/940.pdf)
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