The frequency of professional hood cleaning services depends on several factors, such as the type of cooking performed, the volume of food prepared, and local regulations. Generally, most commercial kitchens should have their hood systems professionally cleaned every three to six months. However, higher-volume kitchens or those utilizing solid fuels like wood or charcoal may require more frequent cleanings. To determine the optimal schedule for your specific needs and ensure compliance with local regulations, it is essential to seek advice from a reputable hood cleaning company.