Rigid Testing

All Amerimax Windows and Patio Doors are stringently tested by independent laboratories for:

Thermal Performance
Structural Integrity
Air Infiltration
Water Resistance
Wind Loads


Thermal performance tests are in accordance with NFRC Standards and requirements.



Structural, air and water performance tests are to AAMA standards.

Test results are certified and administered through Keystone Certifications, an ANSI accredited, licensed, independent certification agency. All Amerimax windows with the Ameriglass™ IG system meet or exceed Energy Star® requirements in all climate zones.