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Multiple Kolbe products meet PHIUS performance requirements

PHIUS = Passive House Institute U.S.

Wausau, Wis. (Jan. 2015) – Kolbe is proud to offer a wide range of VistaLuxe® Collection and Ultra Series windows and doors that have received certification from the Passive House Institute US (PHIUS). This range of certified products means the American-made windows and doors for an entire passive house project are available from one manufacturer.

 "We are pleased to offer windows and doors that meet the strict guidelines of PHIUS Certified Data for Windows program, so that we can help architects, builders, and homeowners continue their commitment to high performance building principles," says Kolbe's president Jeff De Lonay. "Our PHIUS-certified products have the same attention-to-detail and superior quality for which Kolbe products are known. Plus, these products are available with the multitude of options you've come to expect from Kolbe."

Kolbe continually designs products to meet or exceed today's stricter building codes and standards for energy efficiency. PHIUS-certified products feature argon-filled triple pane glass with different LoE coating options. In addition to many Ultra Series extruded aluminum-clad products, the PHIUS-certified offering includes VistaLuxe Collection extruded aluminum-clad products in both the Flush and Accent Plus exterior styles.

The windows and doors recommended by PHIUS in certain climate zones include:

Passive House performance certification criteria are dependent upon a number of factors, including LoE coatings, lite divisions, and elevation placement. The PHIUS Certified Data for Windows program evaluates and recommends windows for passive house projects, by climate zone, based on manufacturer-supplied window specifications. For complete information, specific product details, and data on PHIUS-certified products from Kolbe, visit To view Kolbe's energy-efficient windows and doors, please visit or the 2015 International Builders Show in booth #C2608.


What began in 1946 as a two-brother team has grown into an internationally respected manufacturing company. Kolbe & Kolbe Millwork Co., Inc. is one of the nation's leading manufacturers of windows and doors for residential and commercial markets. After more than 65 years, Kolbe products are best known for superior quality, custom craftsmanship, attention to detail, as well as innovative and unique designs.

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