SAGE Electrochromics, Inc., a wholly owned subsidiary of Saint-Gobain, is a specialized window glass developer based in Faribault, Minnesota. The company develops electronically tintable smart glass (also called electrochromic glass, EC, dynamic glass or smart glass), for use in building windows, skylights and curtainwalls, that can be electronically tinted or cleared to optimize daylight and improve occupant comfort in buildings. According to the U.S. Department of Energy’s (DOE) Lawrence Berkeley National Laboratory (LBNL), SAGE's SageGlass technology "has the potential to reduce building heating and air conditioning equipment size by up to 25%, resulting in construction cost savings.