A simple model consisting of heat lamps, radiometers, an IGU of clear glass and an IGU of Solarban® 70XL glass by PPG demonstrates how low-emissivity or low-e glass works for solar control. Heat lamps simulate infrared light or heat radiation from the sun passing through the glass and touching the radiometers on the other side. The model shows solar control low-e glass blocks a great deal of the infrared light coming through the glass, while the clear glass allows it to pass through. The model also demonstrates solar energy being transmitted through clear glass and reflected off the solar control low-e glass. This means that, when used on a building in an air conditioning-dominated climate, solar control low-e glass will help keep solar energy out, enabling more efficient cooling and smaller HVAC systems.
To see this quick, informative video, look for Low-E Demonstration Video on the PPG Glass Education Center website.