Flat Oval to Round 45° Lateral T-Piece

The Flat Oval to Round 45° Lateral T-Piece is designed to create a smooth branch connection from a flat oval main duct to a round duct outlet at a 45° angle. This configuration helps maintain efficient airflow while allowing seamless transitions between flat oval and round ducting systems. Ideal for space-restricted ceiling voids, it combines the high air volume capacity of round ductwork with the low-profile benefits of flat oval systems, making it well suited to commercial, retail and industrial HVAC installations where both performance and space efficiency are essential. Fits into shallow ceiling voids where round ducting is too tall, maintaining the high-volume capacity required for efficient HVAC performance Fabricated from premium hot-dip galvanised steel for great structural rigidity and long-term corrosion resistance The seam provides a robust permanent seal Ideal for exposed-ceiling designs in commercial and high-end retail spaces Fittings supplied small end as standard to fit into straight duct Apart from stiffening requirements, flat oval ducts follow the same construction standards across all pressure ranges defined in DW144 In some cases, additional stiffening is required in the form of tie bars which are fitted in line with DW144