Manufacturers code on the inside of new triple glazed units?

Ganga

Our double glazed units have the manufacturers name and window number in between both panes ,it is in white on a black background but you have to look hard to see it ,the windows are about 20 years old.

Carrot007

Ganga said:

Our double glazed units have the manufacturers name and window number in between both panes ,it is in white on a black background but you have to look hard to see it ,the windows are about 20 years old.

Interesting, I cannot see them on the ones here when I got here, but then again I think decent manufacturers probably have for much longer than required! (and being awarte of the previous owners......). I just think it may be op's manufacture went with bad contrasting colours and put them on the side rather than the top (or bottom) where they would not be as noticed.

Poor show on them I guess, leave a bad review styating what then did I guess OP.

m0t

You could ask them to come and rotate the unit so that instead of being at eye height on the top right it was down on the bottom left and less noticeable?