To ensure compliance with US market requirements, Astec products are certified according to the rigorous NFRC Certification Process, a certification system that evaluates the energy performance of windows, doors and skylights.
The process provides objective and standardized measurements on several key parameters related to the energy efficiency of the products, including:
- - Thermal transmittance (U-value)
- - Solar Heat Gain Coefficient (SHGC)
- - Visible transmittance (VT)
- - Air Leakage

