Shop by Nordfab Size

Shop the Nordfab QuickFit (QF) clamp-together ducting system by metric size, from 80mm to 710mm 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.

Prefer to work in inches? The same products are organised under our imperial Nordfab size categories.