Selecting the right unit
Before you begin using the laboratory ventilation equipment it's important to consider what materials you're using and how you will be using them.
Ask yourself questions such as:
- Am I using hazardous chemicals/vapors?
- Am I using known or expected infectious agents?
- Does what I'm working with need to be free from particulates?
Ventilation Equipment Suggested for Materials Used
| Materials Used |
Ventilation Equipment Suggested |
| Chemical Vapors |
FH, BSC; Class II; type B2*, Class III |
| Known or expected infectious agents |
BSC; all types |
| Biological specimens (not infectious) |
BSC; all types, LFH |
| Radionuclides |
FH, BSC; Class II; type B2*, Class III |
| Trace radionuclides |
FH, BSC; Class II; type B1*, B2*, Class III |
| Minute amounts of chemical vapors |
FH, BSC; Class II; type B1*, B2*, Class III |
| Products needing to be free of particulates |
LFH, BSC (all but class I) |
* Only if cabinet is hard ducted to building exhaust system