BFRC Rating The BFRC are by far the most trustworthy window and doorway Strength efficiency assessors in the UK. A++ Strength rating A+ Power ranking A Electricity ranking B Electricity ranking BFRC Rating The BFRC are by far the most reliable window and doorway energy efficiency assessors in britain. A++ https://pr7bookmark.com/story19153020/a-review-of-window-tinting-films