What is a BFRC Rating?
The BFRC rating is an alternative method of defining
the energy efficiency of windows and doors.
The existing “U” value measurement only considers
one element of the frame, whereas the BFRC rating
takes into account a formula which covers thermal
efficiency (U-Value), the solar gain effect due to glass
specification (g-Value) and the air leakage
performance of the window.1
The energy efficiency of a window is given a rating
between A - G (A being best). The energy rating of the
product is indicated on a colour coded labeling system.
A Typical BFRC Energy Rating Label
A high percentage of the UK's carbon dioxide emissions come
from energy which we use every day, particularly at home. By
saving energy we not only reduce carbon dioxide emissions, but
also help fight climate change.
But what does this have to do with doors and windows?
In order to make the building envelope more energy efficient, each element which
makes up the dwelling has to achieve a set criteria for energy rating (i.e bricks, tiles,
insulation etc)
Current regulations look for a “D & E” rating for the window, but a “C” rating or better
will qualify the product for the “Energy Saving Trust” recommended label.
The Energy Saving Trust (EST) is a non-profit organisation jointly funded by the British
Government and the private sector in order to promote the sustainable use of energy,
energy conservation, and to cut carbon dioxide emissions in the United Kingdom. The
Trust was established following the 1992 Earth Summit.
Examples of Window Energy Efficiency Ratings Required for Different
Sectors of the Window / Door Market Place
New Extensions Domestic Replacement New Build Windows Conservatories
Must meet either: Must meet either: Inclusion withing the SAPS No specific requirements if
2005 calculation less than 30m and is
A. BFRC Rating D A. BFRC Rating E thermally separated from
the dwelling and any
B. Max U-Value of 1.8 B. Max U-Value of 2.0 heating system has its own
controls. Otherwise it must
C. Max Centre Pane C. Max Centre Pane comply with Domestic
U-Value 1.2 U-Value 1.2 Replacement.
Issue: 2 (January 2008) 7.5
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