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 – Catalytic CartridgeLogin to see price Recess Adapter CanLogin to see price PuriFi SensorLogin to see price PuriFi Smart HubLogin to see price