Insulating glass (also referred to as “insulated glass”) refers to two or more lites of glass sealed around the edges with an air space between to form a single unit.

Commonly referred to as an “IGU,” insulating glass is the most effective way to reduce air-to-air heat transfer through the glazing. When used in conjunction with low-E and/or reflective glass coatings, IGUs become an effective means to conserve energy and comply with building codes.

The most common architectural insulating glass unit configuration is 1/4″ glass, 1/2″ air space and 1/4″ glass.