How can I check that your EPD certificate is genuine?

To verify the Yuantai Derun hollow section EPD, take two steps, both on the certifier's website rather than ours. First, open our entry on the Global GreenTag public product register, where the manufacturer name, product and certification labels are listed. Second, download the certificates directly from Global GreenTag: the EPD licence number is TIA:TI01:2026:EP and the PHD licence number is TIA:TI01:2026:PH.

Both files are served from the certifier's own domain, so what you get is the current version rather than a copy that may have been superseded. You can also confirm that Global GreenTag appears on ECO Platform's register of established EPD programmes, which is where a consultant normally checks that a programme operator counts.

If a supplier can only show you a certificate image hosted on their own website, treat it with more caution: it cannot be checked against an independent source, and it does not tell you whether the version you are seeing is still current.

The full record, including what each declaration covers, the rating tools it is recognised by and the declared carbon figure, is on our EPD certification page.