It is a compendium of transmittances, reflectances, and emissivities on all major glass products manufactured in the United States for use in residential and commercial windows. These data are measured by manufacturers who have standardized their measurement practices. The numbers are then peer reviewed and reviewed by LBNL to check for consistency. The 1,000 or so entries in this database represent single glass layers. For laminates and applied films, LBNL developed Optics.
Users specify the composition of a laminate or glass-film combination.
They then specify the size, shading, and thermal properties of the windows. Not all products can be simulated using the four software programs described above. Spot testing is also needed to validate simulation tools, showing that real product performance is consistent with simulation results. Dariush Arasteh, Robin Mitchell, Elizabeth Finlayson, and Mike Rubin are researchers at Lawrence Berkeley National Laboratory in Berkeley, California. Charlie Huizenga is a research specialist at the University of California at Berkeley.