Andrew Grisafi September 29, 2020 Partnership, High performance, Doors, Windows, Storefronts, Product Highlight Take a peek at Bertrand's passive window series Andrew Grisafi September 29, 2020 Partnership, High performance, Doors, Windows, Storefronts, Product Highlight When it comes to passive houses, you can’t be passive about your choice in windows. Every choice is a careful balance of performance and aesthetics.