BFRC Ranking The BFRC are one of the most dependable window and doorway energy effectiveness assessors in the UK. A++ energy score A+ energy ranking A Vitality rating B Strength rating BFRC Score The BFRC are the most reliable window and door Power efficiency assessors in the UK. A++ A+ https://www.apptape.co.uk/blog/dec-advantages-of-window-tinting-films/