Energate Wood and Vinyl Passivhaus Windows

Credit: H Window Company, LLC

What makes this product green?

  • Reduces heating and cooling loads
  • Certified wood


German manufacturer Energate makes high-performance wood and vinylCommon term for polyvinyl chloride (PVC). In chemistry, vinyl refers to a carbon-and-hydrogen group (H2C=CH–) that attaches to another functional group, such as chlorine (vinyl chloride) or acetate (vinyl acetate). windows, including some certified by the Passivhaus Institut to meet Passive HouseA residential building construction standard requiring very low levels of air leakage, very high levels of insulation, and windows with a very low U-factor. Developed in the early 1990s by Bo Adamson and Wolfgang Feist, the standard is now promoted by the Passivhaus Institut in Darmstadt, Germany. To meet the standard, a home must have an infiltration rate no greater than 0.60 AC/H @ 50 pascals, a maximum annual heating energy use of 15 kWh per square meter (4,755 Btu per square foot), a maximum annual cooling energy use of 15 kWh per square meter (1.39 kWh per square foot), and maximum source energy use for all purposes of 120 kWh per square meter (11.1 kWh per square foot). The standard recommends, but does not require, a maximum design heating load of 10 W per square meter and windows with a maximum U-factor of 0.14. The Passivhaus standard was developed for buildings in central and northern Europe; efforts are underway to clarify the best techniques to achieve the standard for buildings in hot climates. standards for airtightness and thermal performance. These triple-glazed windows range in overall U-factorMeasure of the heat conducted through a given product or material—the number of British thermal units (Btus) of heat that move through a square foot of the material in one hour for every 1 degree Fahrenheit difference in temperature across the material (Btu/ft2°F hr). U-factor is the inverse of R-value. from 0.10–0.15 with center-of-glass U-factors ranging from 0.09–0.12, tested to European Standard EN 10077. Aluminum claddingMaterials used on the roof and walls to enclose a house, providing protection against weather. is available on the wood windows. The sealed units are available filled with air or argonInert (chemically stable) gas, which, because of its low thermal conductivity, is often used as gas fill between the panes of energy-efficient windows. . The frames, available in spruce, pine, larch, meranti and oak, are typically 82–117 mm deep. Gasketing and a multi-step profile create a triple-seal for superior airtightness.

Additional Info


  • Forest Stewardship Council (FSC)

Manufacturer Information

H Window Company, LLC
401 17th Ave. W.
Ashland, WI 54806
Phone: 715-685-2793
Fax: 715-685-9441
Toll-free: 800-843-4929

Listed in: Plastic Windows, Wood Windows