Notes

• All performance data is determined using LBL window 7.5 software, NFRC 100 – 2010 conditions have been used.
• The values given are centre of glass values. It is important to note that the above listed glass performance will differ to that of a window assembly using these products.
• Glass surfaces are counted from the exterior face of the building.
• Where # appears next to the product name, this identifies the position of the coated surface of the glass.
• The above information is accurate to the best of our knowledge. Viridian Glass Ltd Pty disclaims any liability for loss or damage arising from the use of such data.
• It is recommended that a thermal assessment be carried out prior to specifying any type of performance glass to determine any risk of thermal breakage.

Definitions of values

• Nominal Thickness – This indicates glass thicknesses and spacer sizes. In a double glazed unit (IGU), the first number represents the external panel thickness, followed by the spacer width and the internal panel thickness.
• Visible Light Transmission (VLT) – Percentage of light passing directly through the glass, the higher the percentage the more light that will pass through.
• Solar Heat Gain Coefficient (SHGC) – The proportion of total solar radiation that is transferred through the glass, which results in heating the home. Lower numbers indicate better solar performance.
• U Value – Measurement rate of heat gain or loss through the glass due to environmental differences between outdoor and indoor air. It is measured in watts over m2 per degree Celsius (w/m2°C).
• Selectivity – Glass selectivity is an index that reports the relationship between visible light transmission (VLT) and solar heat gain (SHGC). High selectivity is more preferable in modern building design.

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