Hi Charlotte,

Thanks for your question. I believe the data would be based on whatever the ‘industry average’ aluminium framed commercial double-glazed fixed window is. It’s the whole window unit so it would include both the glass and frame. For more specific frame thickness & ratio specifications used, you’ll need to inspect the source AusLCI/EcoInvent dataset which you can access via this post: https://support.etoollcd.com/index.php/faq/etoollcd-questions/what-lci-data-sources-does-etoollcd-use/

I hope that answers your question.