Clearance: A bare minimum 450mm clearance is recommended with the cooking area to the underside of any grease filter. Height: Normally, the height from the floor to the underside on the canopy need to evaluate 2000-2100mm. You should not look ahead to inspections or incidents to prioritize your kitchen's protection. https://josuezrhwj.blogofchange.com/37696594/grease-tight-extract-ductwork-things-to-know-before-you-buy