Performance metrics & physics
Energy Star Rating
Energy Star is the US Department of Energy certification for window films and glass that meet specific thermal performance thresholds, indicating proven energy-saving benefit.
Energy Star for window film requires verified total solar energy rejection, SHGC and U-value performance against published thresholds. Films carrying the certification have undergone third-party testing.
In Singapore the Energy Star mark is not a formal regulatory requirement, but architects and consultants specifying film for commercial projects often look for Energy Star certification as a quality indicator.
For Singapore commercial buildings pursuing Green Mark or LEED certification, Energy Star-rated window film contributes to documented energy efficiency credits.