Rectangular Straight Length Ductwork
Galvanised rectangular duct for straight runs — made to any size, e.g. 400x200 duct. UK-made to DW144, made to order. Instant online price, no account needed.
Straight lengths are the backbone of any rectangular ductwork run, carrying supply or extract air between fittings. Each length is folded and seam-sealed from galvanised steel to your exact width and height, so runs stay airtight and rigid across long spans.
- Category
- Rectangular Ductwork
- Standard
- DW144 compliant
- Made in
- UK (Knebworth, Hertfordshire)
- Lead time
- Made to order, fast dispatch
Common uses
- Main supply and extract runs in commercial HVAC
- Riser and ceiling-void air distribution
- Kitchen and process extract systems
- Linking bends, reducers and branches into a continuous run
Sizing & specification
Made to any width and height on the 50mm price grid, in lengths up to 1500mm. Order matching Mez flanges or angle cleats to joint sections together.
Use the online configurator to enter your dimensions and receive an instant price. No account required. Add to quote and submit directly to us.
For bespoke orders or to discuss a project, contact us or call 07710 984 957.
Rectangular Straight Length — frequently asked questions
What length do straight sections come in?
Up to 1500mm per section as standard; longer runs are built by jointing several lengths with Mez flanges or angle cleats.
Are the ducts sealed?
Yes — all seams are sealed with oil-based mastic and the ends are protected with blue film until installation.
Related rectangular ductwork
- Rectangular Bend / Elbow — Rectangular bend — 90° or 45° elbow to change duct direction
- Rectangular Reducer — Rectangular reducer between two different duct sizes
- Rectangular Loose Mez Frame — Loose mezzanine flange frame for jointing rectangular duct