Visible Transmittance
From Zissil
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|title = VT Window Rating | |title = VT Window Rating | ||
|image = [[File:Space holder.jpg|215px|alt=Block Glass Windows]] | |image = [[File:Space holder.jpg|215px|alt=Block Glass Windows]] | ||
− | |header5 = | + | |header5 = Window Visible transmittance (VT) |
|data6 = Window Visible transmittance (VT) | |data6 = Window Visible transmittance (VT) | ||
|header7 = Description: | |header7 = Description: | ||
− | |data8 = | + | |data8 = Matching replacement windows to a home's visible transmittance needs can save energy and reduce cooling costs.}} |
Homeowners can rely on the ratings for a replacement window's '''visible transmittance''' to ensure that the daylighting provided is integrated with lighting controls. Such integration will reduce dependence on artificial lighting and, in many cases, lower heat transfer. | Homeowners can rely on the ratings for a replacement window's '''visible transmittance''' to ensure that the daylighting provided is integrated with lighting controls. Such integration will reduce dependence on artificial lighting and, in many cases, lower heat transfer. | ||
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The Energy Star Window program includes U-Factor ratings and Solar Heat Gain Coefficient ratings in their assessment of a window's eligibility for tax credits. They do not include the ratings for Visible Transmittance, nor for Air Leakage or Condensation Resistance. | The Energy Star Window program includes U-Factor ratings and Solar Heat Gain Coefficient ratings in their assessment of a window's eligibility for tax credits. They do not include the ratings for Visible Transmittance, nor for Air Leakage or Condensation Resistance. | ||
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[[Category:Replacement Windows]] | [[Category:Replacement Windows]] |