Christine Williamson: “Windows That Insulate Like Walls” – Discussing Alpen Windows
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This excellent video features a discussion and interview with Craig Maierhofer of Alpen Windows. Some introductory info about Acelab for Architects and then the actual interview with Alpen starts at minute 10.
https://www.youtube.com/watch?v=wdI0J32yQY4&t=25s
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