Fume hoods were introduced about 100 years ago to safeguard personnel working with hazardous materials.
Air is drawn from the workplace, around the worker and into the front of the hood, and is then exhausted out of the laboratory.
Rising energy costs have made these hoods exceptionally expensive to operate.
To optimize the effectiveness of properly designed hoods:[3] The control of hazards is more than simply enclosing the problem.
What are important are how well the ventilated areas contain the hazards and suitability of the workstations for the specific tasks being performed.