Ductwork Suppliers in Hertfordshire — Made Here in Knebworth

If you're installing ventilation anywhere in Hertfordshire — Stevenage, Welwyn Garden City, Hatfield, St Albans, Watford, Hemel Hempstead, Hertford or the towns between — your ductwork can come from a fabricator a few minutes up the road rather than a national depot. Smart Ventilation Systems manufactures rectangular ductwork and fittings to DW144 in Knebworth, just off the A1(M).

Being local cuts out transport time and re-order delays: collect from the workshop, or have us deliver across the county — and if a dimension changes on site, a remade section is days away, not weeks.

Serving contractors across Hertfordshire

  • Stevenage, Knebworth, Hitchin and Letchworth
  • Welwyn Garden City, Hatfield and Hertford
  • St Albans, Harpenden and Hemel Hempstead
  • Watford, Borehamwood and Cheshunt
  • Bishop's Stortford, Ware and Royston

Order online, collect or take local delivery

Standard rectangular parts can be priced and ordered online in minutes — every section made to your exact millimetre dimensions. Choose free collection from Knebworth at checkout, or delivery to site anywhere in Hertfordshire and beyond. For bigger packages, send your drawings and we'll return a priced take-off. Approved trade customers can order on account.

Frequently asked questions

Where in Hertfordshire are you based?

Our fabrication workshop is in Knebworth, just south of Stevenage and a couple of minutes from the A1(M). Collection is welcome once your order is confirmed ready.

How quickly can you deliver ductwork in Hertfordshire?

Made-to-order sections typically despatch within days, and because delivery runs are short within the county, Hertfordshire sites are usually among the fastest we serve. Tell us your programme dates and we'll confirm.

Can I collect my ductwork order from your workshop?

Yes — choose collection at checkout and we'll email when the order is ready to pick up from Knebworth. Collection is free.

Do you only supply Hertfordshire?

No — we deliver UK-wide. Hertfordshire simply gets the benefit of being on our doorstep, with shorter delivery runs and easy collection.