The outstanding insulating properties of Duracast® help make Pella Impervia windows and patio doors highly energy-efficient, helping you enjoy savings on energy costs.
- Most Pella Impervia products with Low-E insulating glass meet or exceed ENERGY STAR® guidelines
in all 50 states.*
- Virtually every unit is factory-tested for air infiltration. And all products are tested for compliance with WDMA Hallmark Certification testing standards.
- Glass options: clear insulating glass; energy-saving Low-E insulating glass with argon; obscure privacy glass or tempered glass.
*Some Pella products may not meet ENERGY STAR guidelines in Canada. For more information, contact your local Pella representative or go to energystar.gc.ca.