



| Feature | Ducted Fume Hood | Ductless Fume Hood |
|---|---|---|
| Exhaust | Ventilates air outside the building | Recirculates filtered air back into the lab |
| Installation | Requires ductwork and exhaust system | No ductwork required |
| Application | Suitable for high-risk, hazardous chemicals | Best for low-risk applications |
| Energy Consumption | Higher (due to exhaust and air conditioning) | Lower (no need for exhausting air outside) |
| Filter Maintenance | No filters needed | Requires regular filter replacement |
| Space Requirements | Requires space for ductwork and exhaust | More flexible (no ducts needed) |
| Mobility | Fixed in place | Portable and movable |