• In geographical regions, where summers and winters are both experienced throughout the year, it is important for glass to provide heat insulation and solar control as well. Heat and solar control glasses have to be used for decreasing heat loss during the cold days and for limiting solar heat gains during the hot days of the year.
  
  
• Heat and solar control properties can be provided by applying a coating on the surface of the glass or by incorporating a solar control glass and a heat control glass within an insulating glass unit separately.