Lewis Ventilation & Ducting designers, manufacturers and installers of both bespoke and spiral ductwork systems Our type of work various from one off kitchen canopies and associated extract to full blown building installations to large commercial premises We are able to design duct systems in house and produce layout From our 6000 sq ft factory in Cheltenham we have manufactured ducting supplied to projects throughout Great Britain including hospitals, shops, leisure centres, restaurants and the like With our in house blacksmithing service we are able to offer any type of bespoke metal work and structures to accompany many ventilation installations