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Optiwin Windows

The architecture team is currently working with Katrin Klingenberg who is in contact with Optiwin Windows out of Germany. The number and placement of windows has yet to be finalized.

Optiwin windows are hand made and custom designed specifically for use in low-energy applications, especially for passive houses. They are the first passive house certified windows available in the US, having U-values of between 0.129 and 0.139, depending on design.

Since these windows are all custom made and hand crafted, I am concerned with their cost and lead time. That information is not readily available on the website (


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