We bought the Pella Impervia to replace a rusting, steel-frame bathroom window. We are dedicated to being as green as possible. While we didn't find a perfect product in that regard, the Impervia comes close. It is fiberglass which, while not recyclable now, should be in the future - long before the window actually needs to be replaced. It has a lifetime warranty and it is beautiful. Vinyl off gases is made from petroleum and is all-around bad news for the environment. We looked at wood, but decided against only because this particular window was for a bathroom.

The window is easy to clean and...