Energy efficient & day lighting glazing

The Saint-Gobain Glass range of products, while being relatively energy intensive to produce, can, due to their energy saving properties “pay back” that energy in a matter of a few months once they have been installed in an office or dwelling.
Solar and thermal characteristics have a large influence on energetic performances of façades. Bioclimatic needs of a façade are determined by three elements:

  • Heating: heating needs depend on heat loss of the glazing (energy loss) which can partly be balanced by solar gain. The U-value is the key parameter to influence the heat transfer through the glazing.
  • Air conditioning: cooling need will be influenced by the solar factor. The lower the g value, the more efficient the glazing is at blocking the entry of solar energy and less air conditioning is required.
  • Lighting: the higher the light transmission of your glazing is, the least artificial light is needed.

The specification for the solar factor (or Shading Coefficient), the light transmittance and the U-value of the glazing has to be made according to the building design and its localization, the size and orientation of the glazings. Simulation of the energy efficiency enables to determine the optimal glazing while minimizing the sum of the three kinds of energy consumption.
 
There are two types of glazing:

  • Glazing with high light transmission and medium to high solar factor to help to warm the building. These glazing are perfectly suitable for cold and mixed climates or for glazing with low sun exposure.
  • Glazing with a lower light transmission and low solar factors more adapted for warm climates. 

Saint-Gobain Glass glass range is composed of all this large variety of products achieving various performances. Click on the link and discover our brochure "The Essential" to get more details.