Efficientwindows.org
#57

Welcome to the Efficient Windows Collaborative

Efficient Windows Collaborative's web site provides unbiased information on the benefits of energy-efficient windows, descriptions of how they work, and ...

Link: efficientwindows.org

  • Design Guidance for New Windows | Efficient Windows Collaborative

    efficientwindows.org 20 Jul '16, 5pm

    These guides examine the energy use impacts of new windows for homes in hot, mixed and cold climates. They show the the impact of orientation, window area, and shading. The energy use has been calculated for various window design variations including 5 orientations (equal, north, east...

  • Welcome to the Efficient Windows Collaborative

    efficientwindows.org 04 Jun '16, 1pm

    Measuring Performance: U-Factor What is the difference between U-factor and R-value? While the U-factor is used to express the insulation value of windows, R-value is used for insulation in most other parts of the building envelope (walls, floors, roofs). While they are related, diffe...

  • Understanding Windows: Learn about the energy & cost savings associated w/ windows (Efficient Window Collaborative)

    Welcome to

    efficientwindows.org 24 Nov '14, 4am

    In climates with a significant heating season, non-energy efficient windows can represent a major source of unwanted heat loss, discomfort, and condensation problems. In recent decades, windows have undergone a technological revolution. It is now possible to have lower heat loss, less...

  • Need help choosing the right window? Here is an excellent tool for making that decision! #nstar

    Welcome to the Efficient Windows Collaborative Web Site

    efficientwindows.org 07 Oct '11, 3pm

    Efficient Windows Collaborative (EWC) members have made a commitment to manufacture and promote energy-efficient windows. This site provides unbiased information on the benefits of energy-efficient windows, descriptions of how they work, and recommendations for their selection and use...

  • #WindowTip: Introduce daylight from two directions to avoid glare & visual hot spots

    Welcome to

    efficientwindows.org 21 Nov '14, 11pm

    As the sun moves through the sky during the day and in different seasons of the year, its angle of penetration into a room changes significantly. In the middle of the day during the summer in the northern hemisphere, for example, the sun comes in high overhead and strikes near the sil...

  • Welcome to the Efficient Windows Collaborative

    efficientwindows.org 21 Aug '13, 8pm

    Windows: U≤0.30 (up to 0.31 if SHGC≥0.35, up to 0.32 if SHGC≥0.40) Skylights: U≤0.55 EWC Recommendation: If air conditioning needs are minimal, windows that give good access to winter solar heat gain (Solar Heat Gain Coefficient 0.40 or higher) are also energy efficient with U-factors...

  • Welcome to the Efficient Windows Collaborative

    efficientwindows.org 25 Apr '13, 3pm

    Performance Standards: Energy Rating Programs Passive House Institute US The Passive House Institute US (PHIUS) is a 501c(3) nonprofit organization that provides training, education, and research to promote implementation of Passive House Building Energy standard, as well as the desig...

  • Welcome to

    efficientwindows.org 22 Jun '14, 7pm

    for existing homes (replacement windows) to compare performance of 20 different window types in your location. The Window Selection Tool will take you through a series of design conditions pertaining to your design and location. It is a step-by-step decision-making tool to help determ...

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