There should be. Water heaters must pass 3C compulsory certification. You can check it on the CQC website. CQC (China Quality Certification Center) has a certificate inquiry on its website. You can choose CCC (Compulsory Product Certification) certification to query, and you can choose company name, product name and other ways to query. Click Query and it will come out. You can find the relevant information of certification, including the certificate number.