This rangehood adaptor transitions from 220 x 90mm rectangular PVC duct to a standard 150mm round connection. It is designed for connecting a rangehood or other round-outlet appliance to a low-profile flat duct run installed behind cabinetry or within a bulkhead. The formed transition provides a smoother airflow path than an improvised connection, helping reduce leakage, turbulence and pressure loss. Manufactured from lightweight, corrosion-resistant PVC, the adaptor is quick to install and integrates with the complete Airmiq rectangular duct system.