90 Degree Curved Boot

90 degree curved boots for spiral ducting — the biggest selection in our saddle range, with 275 combinations covering branch diameters from 100mm right up to 1000mm. A curved boot takes the branch off at a right angle but with a formed, curved entry that guides air into the branch more smoothly than a plain square take-off.

Right-angle branching done properly

The boot fits over an opening cut in the main duct: screw and seal the flange, and its curved throat gives the branch connection a smoother start than a hard-edged hole — worth having on extract branches that work hard. Because the range extends to very large branch diameters, curved boots also cover the big industrial cases where one main duct feeds another of similar size, right up to 1000mm on 1000mm.

Browse by branch size — 100, 125, 150, 160, 180, 200, 224, 250, 280, 300, 315, 355, 400, 450, 500, 560, 600, 630, 710, 762, 800, 900 and 1000mm — then pick the main duct diameter within each. For an angled entry that is even kinder to airflow, see the 45 degree pipe saddle. Stocked sizes despatch next day when ordered by 3pm.