From 450mm
Every spiral duct reducer here has a 450mm (approx. 18″) large end, stepping down to 8 smaller diameters, from 400mm right down to 200mm. Use one wherever your ductwork steps down in diameter — after a branch take-off, at a fan spigot or where space tightens. Supplied from our Leicester warehouse, with free UK mainland delivery on orders over £400 ex VAT.
For reducers starting from other diameters, see all spiral duct reducers.
Showing all 8 results
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Reducer – 450mm to – 200mm
£27.40 + VAT Add to basket -
Reducer – 450mm to – 224mm
£27.34 + VAT Add to basket -
Reducer – 450mm to – 250mm
£27.02 + VAT Add to basket -
Reducer – 450mm to – 280mm
£22.86 + VAT Add to basket -
Reducer – 450mm to – 300mm
£21.42 + VAT Add to basket -
Reducer – 450mm to – 315mm
£19.56 + VAT Add to basket -
Reducer – 450mm to – 355mm
£18.86 + VAT Add to basket -
Reducer – 450mm to – 400mm
£19.92 + VAT Add to basket