Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
FWIW, some manufacturers have published performance data for glazing products with the addition of frit at various densities. One helpful tool to study the influence of frit on SHGC is the Vitro Glass Constructor. You can construct single, double, and triple pane assemblies with the IGDB and prescribe frit patterns to certain company's products. For instance, the Vitro products offer many different frit densities whereas Interpane has none. Old Castle also offers reporting data for glazing products with three different densities and patterns for frit. From what I have seen, the overall contribution to SHGC depends on the substrate glazing but can range from 0.02-0.05 decrease in SHGC with 10% increase in white frit density. Intuitively, white frit will perform better for SHGC but I have not come across any grey frit performance data yet.
