Glazing is a term used to describe the glass in a window whether it is single, double, or triple glazed. So, energy glazing refers to the energy-efficient window glass. The main goal of these types of windows is to slow temperature transfer so that you can use your heating and cooling systems less. Many energy-efficient glazing solutions incorporate double or triple panes, a gas between the panes, and a low-emissivity coating. All of these techniques can improve the overall energy efficiency of the glass.