Landmark Windows

NeoGrec, Pella has a limited lifetime warranty, as you are the original purchaser. They may be willing to do something for you, I would call them.
I never had an issue with Pella, they were always good to deal with, but then we have only used their “Monumental” line for large window projects in manhattan, none of their residential windows.

As far as window manufacturers I think it more depends on the quality (and price) of the window. All the manufacturers have lower and higher priced lines. I have Andersen 400 series on my house because we wanted red oak on the interior to match the rest of the woodwork, they were not cheap. Neither was the arched window I got for under my stoop, but the look of the oak was well worth it and I am very happy with the windows.

We recently did a project with Jeld-Wen where they agreed to put in wire glass on the outer panes for a loft building in manhattan (per Landmarks requirements) custom color frames as well, they were very pleasant to work with on this difficult project and I was happy with the quality of the windows.

For a me ssy, difficult project like replacing windows I would only buy the highest quality window that that particular manufacturer offers, it’s not worth it in the long run to go cheap here.

If you do have your original windows it’s worth it to find a carpenter or woodworker who is willing to futz around with them, and add storm windows made to fit your existing window exterior size, you can get custom colors as well.