BFRC Rating The BFRC are the most trustworthy window and door Power overall performance assessors in the UK. A++ Electricity score A+ Power rating A Electricity rating B Strength ranking BFRC Rating The BFRC are the most trusted window and doorway Electricity performance assessors in the UK. A++ A+ A https://www.apptape.co.uk/blog/dec-advantages-of-window-tinting-films/