Be certain ducting is the right dimensions - if it is way too smaller, it will restrict airflow, and Should the ducting is too significant, it will trigger abnormal sound. The Make up of grease in kitchen extraction and ventilation systems is without doubt one of the best five causes https://grease-tight-extract-duct56788.theideasblog.com/37563889/how-commercial-kitchen-extract-systems-can-save-you-time-stress-and-money