About our UK ductwork manufacturing team
Smart Ventilation Systems Ltd is a specialist ductwork manufacturer and installer based in Knebworth, Hertfordshire. As rectangular and spiral ductwork suppliers, we fabricate in-house, supply direct to site, and install across the UK.
Our story
Smart Ventilation Systems was founded with a simple premise: ductwork should be fabricated to the highest standard, every time — DW144 compliant, mastic sealed, and site-ready from the moment it leaves our workshop.
We grew from A.S Ductwork Ltd, a family business with over 25 years in the trade, built by Tony Smith and Stephanie Gutteridge. Smart Ventilation Systems carries the same values, standards and people forward, with investment in equipment, capacity, and online tools to serve clients across the whole of the UK.
Based in Knebworth, we're a trusted source of rectangular ductwork in Hertfordshire, supplying and installing across London, the Home Counties, and the wider UK.
Our standards & commitments
- DW144 Standard — Every piece meets or exceeds the DW144 industry specification for sheet metal ductwork.
- In-house Fabrication — We manufacture everything ourselves, with full quality control from raw sheet metal to finished duct section.
- Site-Ready Delivery — All ductwork ends are sealed with blue protective film before despatch.
- Oil-Based Mastic Sealed — All seams are sealed with oil-based mastic as standard.
- Public & Private Sector — We serve commercial, industrial, and public sector projects.
- UK-Wide Coverage — Based in Knebworth, Hertfordshire, we supply rectangular and spiral ductwork across the UK.
Contact us
Phone: 07710 984 957 | Email: orders@smart-vent.co.uk