Easily understood ratings
The BFRC energy rating label looks very similar to other rating schemes which you may have seen on a range of products, from domestic white goods to car tyres.
The bandings on the BFRC label are the result of a complex calculation which
takes into account a standard size of window, standard building occupancy and average climate conditions.
Windows and doors with an energy rating of 0 or higher (Ratings A to A++) are considered to be energy positive.
As with all energy rating labels the performance indicated provides a method of comparing one product against another.