Bfrc is the uk s most trusted ratings council with the most widely used rating system for energy performance in window and doors.
Window energy ratings scale.
A window product s rating is listed at the top of the label using a letter and associated colour band.
U factor ratings for windows generally fall between 0 20 and 1 20.
Choosing high performance windows doors and skylights can save you money and keep your home comfortable.
The rating system is based on a scale of e to a with a windows being the most energy efficient.
The lower the u value the greater a window s resistance to heat flow and the better its insulating value.
The lower the number the better an insulator the window or door is.
The bfrc energy window label utilises a traffic light a to e scale on the basis of total energy efficiency where an a rated window is the most energy efficient.
The three other window energy ratings are the solar heat gain coefficient shgc visible transmittance vt and air infiltration or air leakage.
Our instantly recognisable rainbow ratings can now help you prove acoustic performance too with bfrc noise reduction ratings.
Solar heat gain and u factor.
Nfrc is a third party non profit organization that sponsors certified rating and labeling to help consumers.
Understanding a bit about the window energy label its ratings and how they indicate a windows energy efficiency can help you make better buying decisions.
Independently tested and certified energy performance.
The circled value shows you the rating a door has received.
The other three are somewhat less important to energy performance according to energy star but can help you judge how well a window or door will perform in a particular application for example whether it ll let in enough light.
Find out how bfrc ratings can help you.
The energy performance of all energy star qualified windows doors and skylights must be independently tested certified and verified according to test procedures established by the national fenestration rating council nfrc.
45 of that cost is for heating and cooling.
Window energy ratings the window energy rating wer tells you how energy efficient your windows are.
Each rating is split into two values.
Solar heat gain coefficient measures how well a product can resist unwanted direct or indirect solar radiation.
When manufacturing installing or choosing windows and doors you need more than.
The scheme is similar to those seen on household appliances white goods and light bulbs.
The window s insulating value is indicated by the r value which is the inverse of the u value.
The nfrc label provides a reliable way to determine a window s energy properties and to compare products.
