Home / Accessories / Ridged Round Duct Adapter Ridged Round Duct AdapterLogin to see price Categories: Accessories, Air Purification Product ID: 2900 Used to mount the PuriFi to any round ridged or spiral type duct system. Related products PuriFi Smart HubLogin to see price PuriFi SensorLogin to see price PuriFi Current Sensing Power RelayLogin to see price Recess Adapter CanLogin to see price