Are manufactured by an energy star partner.
Door ratings 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.
The nfrc label provides a reliable way to determine a window s energy properties and to compare products.
January 1 2015 the current criteria were finalized in january 2014.
Department of energy and u s.
Windows doors and skylights must meet u factor and where applicable solar.
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.
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.
Current specification effective date.
The energy star program is sponsored by the u s.
The national fenestration rating council nfrc label helps you compare energy performance ratings of doors.
The label shows the solar heat gain coefficient shgc and u factor for the door.
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.
Government in addition to the nfrc ratings.
Though energy star does not require any.
Energy star qualified windows doors and skylights.
The energy star label which means the appliance has met strict energy efficiency criteria set by the u s.
Nonprofit nfrc is the industry recognized certifying body for windows and doors.
Note that energy star considers glass doors to be a type of window.