Start with the required airflow
The equipment duty establishes how much air the route must carry. Duct area affects average air velocity, while length, fittings and geometry contribute to pressure loss. The designer needs to consider those factors together.
Keep the cupboard duty, fan selection and duct drawing on the same revision. Our pressure-drop guide explains the information that connects them.
Identify the dimensions that matter
| Dimension | Confirm |
|---|---|
| Duct size | Specified size and the actual connection dimensions. |
| Equipment outlet | Manufacturer’s drawing and joint arrangement. |
| Available space | Clearance for fittings, supports and access. |
| Transition | Both end dimensions, alignment and length. |
FumeCare’s PVC ducting range spans 150 to 400 mm. Discuss the required size and fabricated components for your application rather than assuming that all components use the same sizing convention.
Review the route as a whole
A shorter route is not automatically a complete design. Account for the cupboard position, fan connections, building penetrations, access and discharge requirements. Changes to one section may affect the rest of the selection.
The fitting schedule guide helps describe bends and transitions. Use the chemical-resistant ducting guide to keep material suitability alongside the dimensional review.
Send a coordinated enquiry
- Provide the required airflow and available pressure calculation.
- Attach a route drawing with lengths and fittings identified.
- Include cupboard and fan connection drawings.
- Describe the chemicals and operating conditions.
- Mark dimensions that still require a site check.
For an existing route, record the actual components before proposing changes. A designer can then review whether the route and fan remain suitable for the revised duty.