Department of energy and u s.
Door ratings energy star.
What makes it energy star.
The nfrc label can be found on all energy star qualified window door and skylight products but energy star bases its qualification only on u factor and solar heat gain coefficient ratings which are described below.
New performance levels pdf 238 86 kb are effective as of january 1 2016 including northern zone prescriptive and equivalent energy performance criteria for windows doors and skylights in all climate zones.
Are independently tested certified and verified by the national fenestration rating council nfrc and have nfrc ratings that meet strict energy efficiency guidelines set by the us environmental protection agency epa.
Government in addition to the nfrc ratings.
Learn more about the nfrc label.
Though energy star does not require any.
Energy star qualified windows doors and skylights.
Windows doors and skylights must meet u factor and where applicable solar.
Are manufactured by an energy star partner.
The national fenestration rating council nfrc label helps you compare energy performance ratings of doors.
The energy star windows program is a voluntary partnership between the department of energy doe and the fenestration industry nfrc to promote sales of energy efficient windows doors and skylights.
The white national fenestration rating council label.
Environmental protection agency to help consumers identify.
January 1 2015 the current criteria were finalized in january 2014.
The nfrc label provides a reliable way to determine a window s energy properties and to compare products.
The energy star program is sponsored by the u s.
The label shows the solar heat gain coefficient shgc and u factor for the door.
Note that energy star considers glass doors to be a type of window.