This range hood is superior quality, used the 6" round ducting already attached and connect it to a 90-degree 6" round adjustable elbow. We love to cook and our whole house no longer smell like a restaurant kitchen, the 860 cfm is more than enough for our open floor plan living room and kitchen without the loud noise of 900 cfm. Bought this range hood during the Black Friday sale of Wayfair and it was a steal!