Energy Department recognizes Alpen for window retrofit project

LOUISVILLE — The U.S. Department of Energy has recognized Alpen High Performance Products Inc. of Louisville for its retrofit of windows in the Pacific Tower in Vancouver, Washington.

The manufacturer produces what has been recognized as the most efficient window in the U.S., ranging from an efficiency of R-5 to R-11. One of its products is a retrofit window, called WinSert Plus, which fits in the existing window frame without removing the old window; it increases efficiency at a lower cost than a complete replacement.

The energy department presented its 2023 Retro 30 Award to Alpen, according to a press…