Ensure ducting is the right dimensions - whether it is also compact, it can prohibit airflow, and if the ducting is just too large, it can bring about abnormal sounds. Overhang: The extraction Cover really should overhang the cooking devices by not less than 250mm within the front and sides. https://raymondqiync.boyblogguide.com/35856934/details-fiction-and-grease-tight-extract-ductwork