What’s the acceptable heat exchange of a window? Here are my west facing windows today: frozen on the outside and with about an inch of clear obviously defrosted space. I’m just trying to figure out if I need to bring it to the attention of the builder (we’re under warranty)

or not, or suck it up and replace as soon as I can. They are Plygem bottom of the barrel type windows. I won’t go into why we ended up with these windows, but here they are. Four of them had a broken seal within the first month.