#Product Trends
Selecting Suitable Insulating Windows and Doors Based on Heat-Transfer Principles (Part III): Vacuum Insulating Glass Systems for Insulating Windows and Doors
Master Insulation Principles to Prevent Parameter-Compliant Yet Underperforming Door & Window Systems
IG and IGU systems both use transparent glass as the main component. However, the different gas conditions in their cavities create both similarities and differences in heat-transfer behaviour.
Because both systems use the same transparent glass, their visible light transmittance and direct solar transmittance are essentially the same. The only slight difference is the minor obstruction from the micro-support points, below 0.5%; this is ignored for simplicity, and direct solar-spectrum transmittance is treated as identical. Both systems use an iterative method to calculate direct solar transmittance.
