Description
The 355mm Jet Cowl is a roof termination for 355mm spiral ducting, designed to discharge extracted air vertically at high velocity while keeping rainwater out of the duct.
Unlike a flat-capped cowl that deflects the airstream, a jet cowl keeps the discharge pointing upwards — important for extract systems handling fumes, process air or kitchen extract, where you want the exhaust thrown clear of the roof and away from air intakes, not spread across it. Its design sheds rain away from the open airway, so weather protection does not come at the cost of extract performance. Fit it at the top of a vertical 355mm riser as the finishing termination of the system.
Key features
- 355mm diameter to suit 355mm spiral ducting
- Vertical high-velocity discharge throws exhaust air clear of the roof
- Sheds rainwater without capping or obstructing the airflow
- Ideal for fume, process and kitchen extract systems
- Available in diameters from 250mm to 1000mm
The current lead time for this item is shown on this page, and delivery is free to UK mainland addresses on orders over £400 ex VAT.
Delivery Information
Made to OrderThis item is made to order. Please allow 3-5 working days for delivery.
Delivery Options
| Service | Estimated Delivery | Cost |
|---|
| Standard Delivery (UK mainland) | Next working day from dispatch | £15.95 +VAT (£7.95 for small items) |
| Free Delivery | Next working day from dispatch | Free on orders over £400 ex VAT |
| Click & Collect | Collect from our Leicester branch | Free |
| Scottish Highlands & Islands | 2-3 working days from dispatch | £36.95 +VAT |
Delivery Area
We deliver to all UK mainland addresses. Scottish Highlands and Islands deliveries may take a little longer. We are not currently delivering to Northern Ireland — Click & Collect remains available.
Questions about delivery? Call us on 0116 246 0031 or email sales@alphaair.co.uk
Returns Policy
Six-Week Returns — No Restocking Fees
We want you to buy with confidence. You can return any standard stocked item within six weeks (42 days) of delivery for a full refund — 100% of the item price, no restocking or handling fees. Trade and business customers get exactly the same rights as retail customers. See our Returns Policy for full details.
Return Conditions
- Items must be unused and in original packaging
- Custom-made, bespoke or powder-coated items are made to your specification and cannot be returned unless faulty
- Items must be returned with proof of purchase
- Return shipping costs are the responsibility of the customer unless the item is faulty
How to Return
- Contact our customer service team to arrange a return
- Pack the item securely in its original packaging
- Include your order number and reason for return
- Ship the item to our returns address
Faulty Items
If you receive a faulty or damaged item, please let us know as soon as possible — ideally within 48 hours of delivery, so we can claim against the courier on your behalf. We will arrange a free collection and send a replacement or issue a full refund. This does not affect your statutory rights.
Questions? Contact us at sales@alphaair.co.uk
