U.S.-based Window Companies Meet Passive House Certification

Window & Door
October 3, 2013

California-based window manufacturers Casagrande Woodworks and Wooden Window are the first U.S. companies to certify windows through the Passive House Institute, based in Germany, according to a press release from PHI.

Casagrande began production of its PHI-certified Synergist model, a wood casement window, this summer. The Synergist window is certified with a whole-window U-value of 0.139/R-value 7.2, according to the release.

Wooden Window expects its CaliPassiv line, which currently includes aluminum-clad fixed and operable wood windows, to start rolling off assembly lines very soon, PHI reports. Both models boast a whole-window U-value of 0.137/R-value 7.3.

"High-quality, energy-efficient building components are a decisive factor for the success of the Passive House concept", says Dr. Benjamin Krick, head of component certification at PHI in Darmstadt, Germany. "The fact that window manufacturers now offer appropriate products in the USA is a promising development."

Read the full release