Window Film Reduces Overheating and Enhances Aesthetics

July 16, 2001

Solar heat gain through existing glass was a serious problem at the Washington, D.C. headquarters of the American Institute of Architects (AIA).

Few realize that a facility’s windows are the biggest contributor to heat gain and the need to run HVAC systems. Block heat from entering windows and it is possible to run HVAC systems less and reduce the cost of energy.

Large expanses of glass raise temperatures and air-conditioning bills. Solar heat gain can lead to the following problems:

   Inability to use space near windows.

   Frequent use and replacement of HVAC equipment.

   Fading and heat damage to furnishings and carpets.

   Uncomfortable building occupants.

V-Kool is the AIA’s choice to reduce overheating. Tinted or mirrored window films block unwanted heat but reduce visible light and darken interiors. At the AIA building, the gray tint of the existing glass meant that the application of a tinted film would dramatically reduce light levels and change the appearance of the building. Neither option was acceptable.

Instead, the AIA selected V-Kool transparent, almost colorless spectrally selective applied window film. Twelve thousand square feet of V-Kool was applied to the entire building, providing the best ratio of visible light transmission to heat rejection without changing the appearance of the building in any way. Spectrally selective window film by V-Kool, Houston. Circle 212.

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