Gallery: US Passive House Conference Showcases Loads Of Green Building ...

 
Perhaps the most engineered product in Passive House is the window with plenty of manufacturers keen to strut their triple and quadruple panes. Big news was the end of Serious Windows, a unique window company which used film in the center instead of a sheet of glass and the only US window that came close to passive house specs. They are reborn as Alpen Windows, a Boulder, Colorado company which founded the technology. Another Boulder window company which is making inroads in the super efficient window market is Zola Windows, which imports custom units that meet the exacting passive house standards and does R&D for the many US climates. Intus Windows, a low cost passive house window, comes in at a much lower price than many other European companies using German components based on uPVC, but fabricates the windows in Lithuania to be more cost-competitive.

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