Clearance: A minimum 450mm clearance is advised from your cooking surface area to your underside of any grease filter. Peak: Generally, the peak from the floor to your underside from the Cover must measure 2000-2100mm. The female side of your duct has the bell portion for which the male parts https://grease-tight-extract-duct34566.pointblog.net/the-greatest-guide-to-commercial-kitchen-extract-systems-83475003