Please note that grilles and louvres made to order are currently experiencing delays to the manufacturer's heavy workload. We have been advised that lead times are in the region of 15-20 working days.


Please note we are currently unable to dispatch to Northern Ireland due to high carriage costs.Please note that we no longer accept Paypal payments.

550x150mm

Ventilation Ducting  | Rectangular Ductwork | Roof Duct with Cravat | 550mm Roof Duct with Cravat |  550x150mm



550x150mm Roof Duct with Cravat
CDT550-150


Please use the drop down menus below to select duct length, cravat width, and the connection methods required (we recommend Doby frames as a general connection method, certainly for larger ducts).

The default cravat slope angle will be approx. 35° regardless of size. Please use the "Any other info" box if you'd like to request a change to this angle.

Please use the 'Any other info' box to fine tune the size if necessary.


Duct length



Cravat width



Connection top



Connection bottom




Any other info or specific requirement (optional):



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550x150mm Roof Duct with Cravat
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