Alpen WinSert® Secondary Window Inserts Demonstrate Up to 18% Whole-Building Energy Savings in GSA Green Proving Ground Testing
GSA field testing results are in: Researchers confirm WinSert® as a cost-effective and efficient way to improve the thermal performance of existing commercial windows WITHOUT window replacement. The U.S. General Services Administration (GSA) has finalized and published the results of its nearly year-long testing and evaluation of Alpen’s WinSert® secondary window inserts. WinSert is:
February 22, 2022