What makes it energy star.
Door ratings energy star.
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.
The national fenestration rating council nfrc label helps you compare energy performance ratings of doors.
Energy star qualified windows doors and skylights.
Environmental protection agency to help consumers identify.
Are manufactured by an energy star partner.
Note that energy star considers glass doors to be a type of window.
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.
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 energy star program is sponsored by the u s.
Government in addition to the nfrc ratings.
Though energy star does not require any.
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.
Learn more about the nfrc label.
The energy star label which means the appliance has met strict energy efficiency criteria set by the u s.
The label shows the solar heat gain coefficient shgc and u factor for the door.
The white national fenestration rating council label.
Nonprofit nfrc is the industry recognized certifying body for windows and doors.