Passive House Institute Certifies First U.S. Window

July 9, 2013

Casagrande Woodworks Inc. has received the first window frame certification in the United States from the Germany-based Passive House Institute for its Synergist model all-wood outswing casement. The window has a thermal transmittance (Uw) of 0.79 W/(m2K) with Passive House Efficiency Class A (advanced component), it is reported.

“We have appropriately named this newly certified window, Synergist,” says Jeff Casagrande, president of the Paso Robles, Calif.-based company. “By collaborating and planning this window design with our tooling and machinery suppliers in advance, we are able to achieve the certification requirement within a week.” He credits the combined efforts of Soukup America, Rangate, Zuani, Alpine Technical Workshops and PHI. 

“Our companies’ goal is to promote and enable production shops to manufacture high performance windows in North America. PHI’s strict criteria provide highly regarded standards which we’ve challenged ourselves to meet,” adds Greg Godbout, president of Rangate, a supplier of woodworking machinery and tooling. “By combining knowledge, technical data and a network of collaborative minds, Casagrande Woodworks will receive the Zuani cutting tools in two weeks. This highly performing timber window with an equivalent performance of R-7.1 (imperial) will soon become a reality.”

The new window is expected be ready for production by late July, officials report.  A complete tooling system enables the Synergist window to be produced by traditional equipment and with growth, later, by a CNC window production machining center without a dramatic increase in additional tooling.

Casagrande Woodworks expects the new window to enjoy strong demand. While tilt-and-turn windows are more commonly installed in Europe to meet such high performance needs, the outswing casement design is popular in the North American marketplace.  The company also expects that North America customers will appreciate the opportunity to obtain a PHI-certified window that is made in North America instead of importing windows from overseas.