Our Windows Have Exceeded The NFRC Test
Manufacturer's Certification Statement
The National Fenestration Rating Council (NFRC) has developed a window energy rating system based on whole product performance.
Download NFRC Testing Results
The NFRC label provides the only reliable way to determine the basic energy-related properties of the window unit and to compare products!
Check out our NFRC Labels - they FAR exceed others in the industry.
Casements have a .01 cfm/ft air infiltration rating at 25 mph and are rated DP 60, suitable for low rise commercial applications. Double hungs have .05 cfm/ft air infiltration rating at 25 mph and are rated DP 45, suitable for light commercial applications.
The U value for double hungs is .33 with Low E Ti-R™ and Krypton/Argon glazing. The U value for casements is .35 with Low E Ti-R™ and Krypton glazing. Thermal tests in determining U values were conducted under NFRC standards.