The Technical Specification for Catering Industry Environmental Protection issued by the Ministry of Environmental Protection of the People's Republic of China stipulates that the distance between the emission outlet purified of oily fumes and the neighboring sensitive targets should not be less than 20 meters.

The horizontal distance between the boundary of a new catering unit that produces oil smoke and the boundary of environmentally sensitive targets should not be less than 9 meters. This is the industry norms, the opening of food service projects should follow this specification.