Compare where the work happens
A fume cupboard contains the work within an enclosure and draws room air through its opening. A canopy sits above a source and depends on the process and airflow arrangement bringing emissions into its capture region.
The shape of a hood alone does not show that it is suitable for a chemical task. Have the control approach assessed against the actual procedure and exposure risks.
Ask the same questions of each approach
| Question | Why it matters |
|---|---|
| Where is the release? | The control must act on the actual source. |
| How does it move? | Heat, momentum and surrounding air can affect the path. |
| Where is the operator? | The design must consider the breathing zone. |
| What can disturb capture? | Room drafts, access and process changes need review. |
Keep heat capture and chemical control distinct
A canopy intended for a particular heat-producing process should not be assumed suitable for a different hazardous-vapour task. Ask the competent assessor to define the containment or capture performance required.
Our local and general ventilation comparison explains the broader roles. For an enclosed option, explore the fume-hood types guide.
Prepare the equipment discussion
- Describe the chemicals and process conditions.
- Show apparatus size and the operator’s working position.
- Identify heat sources and normal access requirements.
- Mark nearby doors and ventilation outlets.
- Record who will assess the proposed control.
Use the Calibre range comparison once the enclosed-cupboard requirements are clear. Include the fan, ducting and room-air scope in the resulting proposal.