Profile: Ventel Sheet Metal Ltd is a manufacturer and installer of ductwork systems for all types of buildings. Our 45° bend is manufactured from galvanized mild steel to DW144 Ductwork Specification. All joints are sealed with mastic sealant. These are available in the dimension of 225 mm width x 25 mm depth. These are suitable for domestic bathroom and kitchen fan extract systems. We manufacture a full range of interconnecting fittings to suit any combination. Aluminum reinforced flexible ducts are manufactured from a multi-ply aluminum and polyester laminate together with a high tensile steel wire helix. It complies with the requirements of BS476 parts 6, 7 and 20 for fire resistance. Our spigot plates are ideal for connecting flexible/spiral duct to a flat surface.