Literally all I know about these windows is the following sticker, apparently designed to peel off before the warranty expires:
How can I identify the maker for warranty purposes?
I know that NAMI is the certifying organization not the vendor https://diy.stackexchange.com/a/27900/5960 I've tried entering NAMI-310414 number into NAMI's database https://www.namicertification.com/supplier-directory/ without luck.