The BFRC Rating equation is based on 3 factors:
- Thermal Transmittance (U-value)
- Solar Factor (g-value)
- Air Leakage (L-value)

A BFRC Rating simply and effectively assesses the energy performance of the whole window. This rating covers the frame material, the frame design, the glass type and all the other components that make up the window.

For the first time it is possible to compare the energy performances of different complete windows simply and quickly.

Want to know more? Have a look at the BFRC FAQs here