What is Fenestration?
Fenestration: Any opening in a building's envelope including windows, doors and skylights.
Windows, doors, skylights, and curtain wall manufacturers are constantly improving and re-designing their products to meet the needs of their customers.
How do these customers know the benefits they can get from new technology?
By looking for the NFRC label or Label Certificate and understanding what NFRC ratings mean.
There are a number of resources available to assist you in this area