Mobile fume hoods are generally designed as a recirculatory system providing exposure protection from Volatile Organic Substances (VOC’s). Typical applications that a mobile system will be suitable for are: Titration, Karl Fischer analysis, General Solvent Handling, Solvent Disposal etc.
Design Features & Performance Criteria
- Mobile Fume Hoods should perform to a recognised containment standard. In Europe this would be the BSEN14175 or ‘Safecheck’ Containment test and in the USA the ASHRAE 110-1995 test protocol would be the recognised test standard.
- The Filter efficiency must be tested in accordance with BSEN7989 in order to determine its efficiency for the application required.
- An airflow alarm (Audible and Visual) must be installed to monitor airflow performance.
Positioning of Mobile Fume Hoods
The same criteria apply for a mobile system as for a fixed system. Incorrect positioning will affect the containment performance of any safety cabinet.
Laboratory hoods should not be located:
- Near doorways as movement in and out of the area can affect performance.
- High traffic areas where personnel will be frequently passing the fume hood openings.
- At right angles to each other, as airflow will be affected causing ‘dead spots’ across the face of the hood.
- In remote corners of the laboratory as air turbulence may be a problem.
- Close to or directly under supply air vents unless supply air is dispersed effectively minimizing turbulence.
- Fume hoods should not face each other directly unless separated by a distance of at least 3 meters (10 Feet). Fume hoods positioned closer than this may end up fighting for air and so affect containment performance.
Lab-Bubble™, as shown on the feature picture, is a bench mounted portable fume hood manufactured by CTS Europe, for more information, please visit lab-bubble.com.