Architectural glass fabricator Viracon, has launched a free online tool to help architects and building owners determine energy performance and cost savings achieved with different glazing configurations. The new Viracon Product Selection Tool offers an easy and affordable way to calculate energy costs, peak demand, carbon emissions, daylight, glare and thermal comfort for various geographic regions, building orientations, and glass configurations. It is one of the only tools available that calculates cost savings per square foot of glass and carbon emissions per square foot of glass. Until now, building designers only had access to simple product parameters such as U-factors and Solar Heat Gain Coefficients when considering glazing options. Viracon’s new tool puts all these factors into context, and gives building owners realistic square foot dollar comparisons to help them evaluate which type of glazing will have the highest energy payback.