Do civil air defense ventilation sleeves need civil air defense certification?

Need. Civil air defense ventilation sleeve refers to the equipment and materials used to ensure ventilation in civil air defense projects, which need to meet the relevant national and local standards and regulations. According to the Civil Air Defense Law, Civil Air Defense Regulations and other laws and regulations, civil air defense projects must be designed, constructed and accepted in accordance with relevant national or local standards and norms, and have passed the corresponding civil air defense certification.