500 square restaurant electricity for the day 30 degrees of electricity, smoke exhaust volume of 75000 cubic meters. According to the query related information: 100 square restaurant smoke volume of 15,000 cubic meters, then 500 square restaurant for 500 times 15,000 equals 75,000 cubic meters. Catering fume emission regulations are: the exhaust system should be sealed intact, prohibit artificial dilution of pollutant concentrations in the exhaust pipe, the length of the exhaust pipe exit section should be at least 4.5 times the diameter of the straight pipe section, the direction should be avoided easily affected by the building.