I live in the east coast of the U.S., New Hampshire, on the seacoast.
I Don't believe that you should be buying windows from an advertisment unless you know the company.
I used to be in the window/siding buisiness until I got smart and went to work for a municipality.
I would rely on your local Building Official, and then I would ask the Building Official in the next town.
Ps.. Please e-mail me before you buy if you can't get the answers that you need!
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