Then apply for a pollutant discharge permit: first apply to the environmental protection bureau of the jurisdiction, and after accepting it, the staff will come to the door for inspection and guidance. The two necessary conditions for obtaining a sewage permit are: there can be no residential buildings upstairs; Sewage should be included in the municipal sewage pipeline. On-site inspectors will decide which range hood to install according to the size of the business area. I bought my own range hood or a range hood that has not been recognized by environmental protection. The staff of the accreditation office reminded that it is best to consult the environmental protection department before deciding whether to rent a store or decorate it. For example, some shopkeepers open stores for decoration, and the smoke outlet or kitchen window is just aimed at the residents behind. Even if the management department doesn't know for a while, the residents behind will still complain and often have to spend money to adjust.