should not be less than 9 meters.

according to the specification, the distance between the main facing surface and the secondary facing surface of the independent dining building and the residential building shall not be less than 9 meters, and the horizontal distance between the kitchen and the residential building in the podium shall not be less than 9 meters. In addition, the distance between the kitchen of the catering unit and the outpatient building of the hospital, the inpatient department and the school teaching building shall not be less than 9 meters.

regulate the oil fume discharge, and the distance between the oil fume outlet after oil fume purification and surrounding houses, schools, hospitals, nursing homes and nurseries shall not be less than 21m. If the building where the catering unit is located is more than 24 meters high, the height of its oil fume outlet from the ground shall not be less than 7 meters, and it shall not be oriented to houses, schools, hospitals, etc. The specification also stipulates that the height of the bottom of the fresh air inlet and outlet of the ventilation system should not be less than 2.5 meters from the ground.