Shop by Nordfab Size (Imperial)

Shop the Nordfab QuickFit (QF) clamp-together ducting system by imperial size, from 3″ to 28″ across 19 diameters. Each size page collects every QF part made in that diameter — branches and cut-ins, reducers, dampers and accessories — so a complete extraction run can be specified size-first, with every part clamping directly onto the next.

Alpha Air Ventilation Supplies is a Leicester-based supplier of commercial and industrial ventilation equipment. Lead times are shown on each product page, and UK delivery is free on orders over £400 ex VAT.

Working in millimetres? The same products are organised under our metric Nordfab size categories.