Understanding Glass Performance Key Metrics
Understanding glass performance key metrics like VLT, SHGC, LSG, SC, U-Value, and R-Value enables informed decisions for energy-efficient and comfortable spaces.
Glass Performance Calculator
Welcome to our interactive glass selector tool where you can find glass that meets your performance requirements. To get started, input your required performance data below.
Performance GUIDE
Selecting glass for a project is an important and sometimes dificult task, to assist in this process G.James ofers the following recommendation for viewing glass samples.
Performance value terms
Solar Energy Direct Transmittance (Te, %) is the percentage of incident solar energy in the wavelength range of 300 nm to 2500 nm that is directly transmitted by the glass.
Complete list of glass optical & thermal properties
A complete list of commonly used optical & thermal properties of architectural glasses (VLT, U-value, SHGC, SC and more).
Energy Performance Calculator | National Glass
U-Value – measure of the thermal insulation of the glass and expressed as watts per square metre. The lower the number the better the performance of the glazing.
PV Estimation Tools & U-Value Estimation Tools
Use Onyx Solar''s PV and U-value estimation tools to calculate energy production and thermal performance of any glass configuration for your project.
Key Glass Performance Measures
Visible light transmittance (VLT) is a percentage of the visible portion of the solar energy spectrum coming through the glass. It is expressed as a figure between 0 (no light) and 100 (all light).
Definitions of Key Terms
Relevance to the consumer or specifier: This number together with the T-sol determines the solar absorption value of the film. This latter value is most critical in determining what film is suitable for a
Standard Insulated Glass Performance Values
Solar Energy Direct Transmittance (Te, %) is the percentage of incident solar energy in the wavelength range of 300 nm to 2500 nm that is directly transmitted by the glass.