Glazing

Tinted glass and glass with a reflective coating are glazing alternatives that reduce heat gain. One example, low-e glass, has a thin metal coating to allow light to pass through the glass;  heat remains on the side where it is originating (it keeps the sun’s heat out of the building and mechanical heating inside the building).  Low-e coatings contribute to energy efficient window assemblies.

Whole Building Design Guide | Windows and Glazing